Plan the portfolio, not just the next deal
Most new landlords underwrite one deal at a time. That works until door 3, then it collapses because nobody planned the sequence. How much capital do I need over 5 years? Which door should be the BRRRR and which should be turnkey? When do I switch to a property manager? When do I 1031 up into a bigger asset? The planner above answers those questions with real numbers. Put in your own pace and watch the 10-year trajectory.
Real example: $60K to 10 doors in 7 years
Investor starts with $60,000 in savings and a $110,000 W-2 income in year 1. She buys two doors in year 1 using a house hack (FHA 3.5% down on a duplex at $285,000, moves in, rents the other side). Cash needed: $13,500 down + $8,000 closing + $3,500 startup = $25,000. Her housing cost drops from $1,800/mo rent to $425/mo net after rental income — she saves $16,500/year in housing cost and has $35,000 left from savings.
Year 2: She moves out of the duplex, rents her side for $1,400, and uses the HOPA (husband-and-partners-accumulate) savings of $16,500 plus $20,000 from her emergency fund to put 25% down on a $210,000 single-family rental. Cash needed: $52,500 down + $6,500 closing = $59,000. She's redeploying her house hack savings. Three doors total, cash flowing ~$750/mo combined.
Years 3–5: One new door per year via conventional financing, paid for by a combination of W-2 savings ($25K/year) and cash flow from existing doors ($9K–$12K/year). Year 5 total: 6 doors, ~$2K/mo cash flow, $380K in equity.
Year 6: She 1031-exchanges her duplex (now worth $360K) into a $520K 4-plex. Four new doors in one transaction using tax-deferred capital. Portfolio is now 9 doors.
Year 7: One more BRRRR acquisition. 10 doors, $3,400/mo cash flow, $620K in equity, and she can quit her W-2 or keep building.
The three compounding variables
Every rental property produces wealth through four mechanisms: cash flow, principal paydown, appreciation, and tax benefits (depreciation, interest deduction, 1031 exchanges). The portfolio planner visualizes three of them.
- Cash flowis the small-looking number that compounds. $375/month per door × 10 doors × rent growth = $4,500/mo in year 1 growing to $6,000+/mo by year 7. It's the only variable that produces income you can live on.
- Principal paydownis the invisible return. Tenants paid down $42,000 of your mortgages this year. That's pure equity growth you don't think about. On a 10-door portfolio, that's $42K of "forced savings" annually, guaranteed regardless of market conditions.
- Appreciationis the leverage multiplier. 3.5% annual appreciation on a $2.5M portfolio is $87,500/year of equity gain. That number is highly variable year to year, but on a 10-year average it's reliable in most US markets.
The capital curve problem
The planner shows you total capital required and when. Most investors don't plan this and hit a capital wall in year 3–4 because they deployed too much of their savings early. A better sequence: deploy 40% of available capital in year 1–2, refi cash-out in year 3 to recycle, deploy the recycled capital + new savings in year 4, and so on. The planner's chart makes this sequencing visible.
Property management: the scale decision
Self-managing is fine for 1–2 doors. At 3–4 doors, the workload becomes 8–15 hours/month and starts cutting into your ability to find the next deal. At 5+ doors, hire a property manager. Yes, 8–10% of rent is a real cost. No, you cannot scale to 10 doors self-managing while holding a W-2 and having a family. Budget for the PM transition and adjust the cash flow assumption in the planner (drop by ~10% of rent per door).
Related tools
Before you add your next door, underwrite with our cash flow analyzer and cash-on-cash return calculator. For BRRRR acquisitions, use the BRRRR strategy calculator and BRRRR planner. When you're ready to 1031 up into bigger property, our 1031 exchange calculator models the deferred tax and replacement minimum.