⚡ Promptolis Original · Money & Finance
🏡 Rental Property Investment Analyzer
Rental property ROI analysis grounded in BiggerPockets + David Greene frameworks — cap rate, cash-on-cash, 1% rule, 50% rule, realistic CapEx + vacancy assumptions, exit strategy fit.
Why this is epic
Most 'rental property calculators' produce fantasy numbers by assuming 0% vacancy, 1% maintenance, no CapEx reserve, no property management. This analyzer uses the realistic operating assumptions that separate deals that work from deals that fail in year 2-3.
Five-metric triangulation (cap rate, cash-on-cash, 1% rule, 50% rule, GRM) grounded in BiggerPockets + David Greene + Rob Abasolo methodology. When all 5 metrics align, the deal is real. When 1-2 disagree, deeper analysis needed. When 4-5 flag concern, walk.
Exit strategy fit: long-hold / BRRRR / STR / house-hack each require different deal criteria. Pack identifies which strategy fits which deal — often the 'bad deal' for one strategy is the 'great deal' for another.
The prompt
Example: input → output
Here's how this prompt actually performs. Real input below, real output from Claude Opus 4.
Purchase price: $320,000 Property type: SFR (3BR/2BA) Location: Columbus, OH — Clintonville Property age: Built 1975 (50 years old) Condition: Light rehab needed ($8K) Projected rent: $2,100/month Financing: Conventional 25% down at 7.25% Strategy: Long-term buy-and-hold Management: Self-manage first 2 years
Your Rental Property Analysis — Columbus OH SFR
Deal Quality Summary
Score: 6.5/10 — Marginal but Workable
This is a tweener deal: not a home-run cash-flow play, not a disaster. With Columbus supporting ~3-4% annual appreciation, it works as a 10-year hold. Cash flow is thin years 1-3; pays off years 5-10 via rent growth + debt paydown.
Verdict: Buy if reserves exist ($15K+ post-down-payment). Walk if first rental without reserves.
The Actual Numbers
Acquisition Costs
- Purchase: $320,000
- Down payment (25%): $80,000
- Closing (2-3%): $7,500
- Light rehab: $8,000
- Reserves: $15,000
- Total cash invested: $110,500
Annual Revenue
- Rent: $2,100 × 12 = $25,200
- Vacancy (7%): -$1,764
- Effective gross income: $23,436
Annual Operating Expenses
- Property tax (Franklin County 2%): -$6,400
- Insurance (landlord): -$1,200
- Maintenance (2% of value for 50yr home): -$6,400
- CapEx reserve ($175/mo): -$2,100
- PM (0% self-managing): $0
- Misc: -$400
- Total OpEx: $16,500
Debt Service
- Loan: $240,000 at 7.25% / 30yr
- Monthly P&I: $1,638 / Annual: $19,656
The Math
- NOI: $6,936/year
- Minus debt service: -$19,656
- Annual cash flow: -$12,720 (NEGATIVE)
Critical Metrics
| Metric | Value | Standard | Status |
|---|---|---|---|
| Cap rate | 2.17% | 7%+ | 🔴 Low |
| Cash-on-cash | -11.5% | 8-12%+ | 🔴 Neg |
| 1% rule | 0.66% | >1% | 🔴 Fails |
| 50% rule | 65% OpEx | <50% | 🔴 Fails |
| GRM | 12.7 | <10 | 🔴 High |
All 5 standard metrics flag concern. Priced for appreciation, not cash flow.
Hidden Costs Most People Miss
1. CapEx at 50yo: Roof ($8-15K), HVAC ($5-10K), water heater ($1-2K), electrical panel ($2-4K). Budget $30K+ over 10-year hold.
2. Tenant turnover: 5-8% annual rent per turnover. Typical stay 18-24 months.
3. Ohio tax increases: Franklin County reassesses; budget 3-5% annual tax increases.
4. Landlord insurance: 20-30% more than owner-occupied. Ohio $1,200-1,800/year for $320K property.
5. Ohio tenant-friendly: Relatively landlord-friendly. Evictions 30-45 days (better than CA/NY).
Sensitivity Analysis
Base case: -$12,720/year cash flow.
What if rent is $2,300? +$2,400/year → -$10,320/year.
What if vacancy doubles to 14%? -$14,484/year.
What if rates drop + refi to 6%? Save $2,388/year → -$10,332/year.
What if 4% annual appreciation (Columbus historical)? Year 10 sale = $473K. Cumulative appreciation: $157K. This is the real play.
10-Year Projection
| Year | Rent | Value | Cash Flow | Cumulative |
|---|---|---|---|---|
| 1 | $2,100 | $333K | -$12,720 | -$12,720 |
| 5 | $2,370 | $389K | -$5,000 | -$50K |
| 10 | $2,750 | $473K | +$4,000 | -$48K |
Exit Year 10: ~$473K sale + equity paydown = approximately $80-120K total profit. ~7-10% annualized ROI on $110K initial. Acceptable but not exceptional.
Local Regulation Red Flags
Columbus OH: Green light.
- No rent control
- No STR ban (licensing required)
- Ohio landlord-friendly
- Property tax moderate (2% effective)
Go / No-Go Recommendation
WALK if: First rental + no reserves + need positive cash flow immediately.
PROCEED if:
- $15K+ reserves beyond $110K acquisition
- Can absorb -$12K/year for 3-5 years from other income
- Long-term appreciation + wealth-building mindset
Negotiate for:
- Price reduction to $295K
- Seller concession $5-8K closing
Exit Strategy Fit
Long-term buy-hold (stated): Marginal fit. Appreciation + paydown produces positive return over 10 years. -$12K/year drag needs other income.
Alternative BRRRR: Better fit. Rehab heavier ($15-25K), ARV ~$360K, refinance 75% = recycle cash. More profitable path if you have rehab skills.
Alternative STR (Columbus allows): Gross $3,500-5,000/mo vs $2,100 LTR. More active management, regulatory risk, furniture ($15-20K initial).
Key Takeaways
- Score 6.5/10 — marginal. All 5 metrics flag concern.
- Year 1: -$12,720 cash flow. Breaks positive year 7-8.
- Appreciation + debt paydown are the profit engines, not cash flow.
- 50yo home CapEx: $30K over 10 years for major systems.
- Columbus green light on regulation.
- Negotiate to $295K if possible.
- $15K+ reserves required beyond acquisition.
- BRRRR or STR may fit better than straight buy-hold.
NOT investment or tax advice. Consult licensed professionals.
Common use cases
- First-time rental property investors evaluating their first deal
- Experienced investors screening multiple properties quickly
- House-hackers evaluating 2-4 unit owner-occupied purchases
- BRRRR strategists calculating rehab + refinance math
- Short-term rental investors with Airbnb/Vrbo strategy
- Anyone evaluating property in markets they don't personally know
- Investors comparing competing deals in different cities
- Investors running sensitivity analysis before offer
- DSCR loan borrowers validating property income supports debt service
- Anyone tempted by a 'great deal' wanting second opinion before committing
Best AI model for this
Claude Opus 4 or GPT-5 Thinking for complex multi-variable analysis. Any LLM for basic cap rate + cash-on-cash math.
Pro tips
- Cap rate 7-10% = solid cash-flow. Sub-5% = pure appreciation play (higher risk). 10%+ = compensation for higher tenant/management risk.
- Realistic vacancy = 5-10% annual. Never model 0% — no rental is never vacant.
- Realistic maintenance = 1.5-3% of property value/year. Older homes higher end.
- CapEx reserve = $100-300/month. Roof, HVAC, water heater all have replacement cycles.
- Property management = 8-12% if hiring PM. Self-managing = your time cost (often underappreciated).
- 1% rule: monthly rent ≥ 1% of purchase price = worth deeper analysis. Below 1% = rarely cash-flows.
- 50% rule: operating expenses typically 50% of gross rent. If expenses <40% of rent, you're missing something.
- Leverage magnifies returns AND risk. 20% down + appreciation = 5x return. 20% down + vacancy + decline = bankruptcy.
- Local regulations matter enormously. Rent control, STR bans, landlord-tenant law friendliness — research before buying.
- Declining neighborhood kills cap-rate logic. High cash flow today + population loss tomorrow = capital loss.
Customization tips
- For SHORT-TERM RENTAL (Airbnb/Vrbo), revenue 2-3x long-term rent but OpEx 25-35% (cleaning, supplies, PM 20%), occupancy 50-70%, regulatory risk HIGH (many cities banning/restricting). Check STR regulations before buying.
- For MULTI-FAMILY (2-4 units), economies of scale improve returns: one roof/foundation across multiple incomes. Typical 4-unit cap rates 7-9% vs 4-6% for SFR. FHA loans available for 2-4 unit owner-occupied at 3.5% down.
- For BRRRR strategy, heavy rehab numbers matter more. Budget 20-30% above contractor quotes (they underestimate). Include soft costs: permits, utilities, holding costs. ARV from appraiser-style comps, not agent optimism.
- For HOUSE-HACK (owner-occupied 2-4), calculate both: (a) full occupancy income minus your expenses, (b) what you'd pay renting elsewhere. Often house-hack net-cost is -$500 to $0/month.
- For CASH BUYERS (no mortgage), cap rate IS cash-on-cash ROI. No debt service confusion. Easier analysis, lower returns (no leverage), lower risk.
- For HIGH-COST CITIES (SF, NYC, Seattle), cash flow virtually impossible at market prices. These are appreciation plays only. Different investor profile — wealthy long-horizon buyers.
- For LOW-COST MARKETS (Detroit, Cleveland, Memphis), high cap rates (10-15%) come with tenant/management challenges. Serious due diligence on tenant pool, crime, neighborhood trajectory.
- For DSCR LOANS (debt-service-coverage-ratio), no personal income verification but rates 1-2% higher. Works with strong property income + messy personal tax returns. Popular among full-time investors.
- For REHAB-HEAVY deals, get 3 contractor quotes + budget 25-30% above middle quote. Renovation always costs more and takes longer. New investors routinely over-run 50%+.
- For DECLINING AREAS (population loss, job losses, rising crime), cap rate alone misleads. High cash flow today + declining neighborhood = capital loss tomorrow. Check 10-year trajectory on population, income, crime, schools.
Variants
Single-Family Rental (SFR)
Standard analysis for 1-unit properties
Multi-Family 2-4 Unit
Economies of scale + FHA house-hack option
BRRRR Strategy
Buy-Rehab-Rent-Refi-Repeat math with ARV projections
Short-Term Rental (Airbnb/Vrbo)
Higher revenue, higher OpEx, regulatory risk
House-Hack (Owner-Occupied 2-4)
Live-in-one rental strategy, FHA 3.5% down eligible
Cash Purchase (No Debt)
Cap rate = cash-on-cash, simpler analysis
Declining Market Risk Assessment
Population/income/trajectory analysis on top of cap rate
Frequently asked questions
How do I use the Rental Property Investment Analyzer prompt?
Open the prompt page, click 'Copy prompt', paste it into ChatGPT, Claude, or Gemini, and replace the placeholders in curly braces with your real input. The prompt is also launchable directly in each model with one click.
Which AI model works best with Rental Property Investment Analyzer?
Claude Opus 4 or GPT-5 Thinking for complex multi-variable analysis. Any LLM for basic cap rate + cash-on-cash math.
Can I customize the Rental Property Investment Analyzer prompt for my use case?
Yes — every Promptolis Original is designed to be customized. Key levers: Cap rate 7-10% = solid cash-flow. Sub-5% = pure appreciation play (higher risk). 10%+ = compensation for higher tenant/management risk.; Realistic vacancy = 5-10% annual. Never model 0% — no rental is never vacant.
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