My House Hacking Math Showed $612 a Month Profit. The Real Number Was -$180.
I bought a triplex in Minneapolis at twenty-six and rented out two units to cover the mortgage. The spreadsheet said house hacking would pay me. Two winters, one boiler, and three tenants taught me what that spreadsheet left out.
My laptop sat on a folding table in an empty unit at 11:30 on a Sunday night, screen the only light on the whole second floor, showing a Google Sheet I'd titled HOUSE HACK FINAL v9. Top line: rent from unit an and unit B totaling $2,340. Bottom line: my all-in payment of $1,728. The cell in bold green read +$612/mo. I remember touching that number with one finger, like checking if it was wet paint.
HOUSE HACK FINAL v9, in bold green
What was at stake was every dollar I had. Twenty-six years old, $42,000 scraped together from four years at a Medtronic engineering job plus wedding-money gifts from both sets of grandparents, looking at a $329,000 triplex on Nicollet Avenue with a roof the inspector called "serviceable, for now." Two servicesable words in his report should have terrified me more than they did.
eleven months, one boiler, $8,900
The green cell lied by omission. Not fraud — omission. Here's what version nine of the spreadsheet contained: principal, interest, taxes of $5,100 yearly, landlord insurance, water bill. Here's what it did not contain: the boiler replacement eleven months later at $8,900, a turnover month between tenants B and C where rent ran zero for twenty-six days, tool purchases at Home Depot that totaled $1,140 before year one ended, and the Minneapolis rental registration fees I honestly did not know existed until a city envelope arrived in October. When I ultimately rebuilt the sheet twelve months in — same math, all fourteen real cost lines — the honest monthly figure was negative one hundred eighty dollars.
the v9 spreadsheet versus the building
None of this means the strategy failed. Write down what actually happened, cuz the failures were boring and the wins were structural. My personal housing cost across that first year: $0. Every roommate-adjacent stranger living below me paid the entire shelter bill, and I lived free in 900 square feet while my coworkers paid $1,600 for studios in Uptown and complained about parking. Over thirty-six months the building's tenants handed me approximately $79,000 of cumulative rent. Meanwhile the Zillow estimate crept from $329,000 to $401,000, which everyone correctly tells me is fake money until you sell or borrow against it.
year one: minus one hundred eighty
The direction matters too. Year one closed at -$180 monthly for real. Year two landed near breakeven after rents rose to $2,610 total and I stopped buying things like a $310 cordless arsenal when a $90 corded set worked fine. Year three just finished at positive $430 average per month, and that's WITH line items for a management stipend to myself and honest maintenance reserves now funded at $200 minimum each month whether used or not. Simple interest works slowly, then all at once.
the 2 a.m. text about one plunger
But I wanna warn expressly about the trap I fell into, cuz half my Instagram feed was preaching this exact playbook in 2023. House hacking content sells you the financing trick — low down payment, live in one unit, rent the rest, magic — and skips the operational job entirely. Nobody online noted dealing with a tenant who moved her boyfriend into unit A without telling anyone, or the 2 a.m. text about a "flooding emergency" that turned out to be a stopped-up toilet needing exactly one plunger, or sitting across a kitchen table in January negotiating an early lease exit with a guy whose job transferred him to Denver. That last conversation took ninety minutes and cost me six weeks of vacancy cuz I handled it with a handshake instead of paper.
rules written in the margins now
Version twelve of the sheet lives printed inside my utility cabinet door, annotated in red pen like a murderer's manifesto. New rule one: reserves before closing, minimum six months of full payment regardless of how many units are pre-leased; my original "$7,400 cushion" evaporated in a single boiler February. Rule two: every tenant pays a $75 late fee after the third, no conversations, and weirdly late payments dropped sixty percent once enforcement became automatic instead of emotional. Rule three: any lease modification gets written up and signed even when the tenant is friendly, ESPECIALLY then, absorbed at the cost of those Denver-negotiation six weeks.
cut the profit in half before you sign
If your calculator currently shows a green cell and you're picturing the folding table and the proud finger-touch like I did, run one exercise before signing anything. Take your projected profit and cut it in half. Then add $150 monthly as a permanent maintenance line and assume one full month of vacancy per unit per year even with great tenants. If the number still clears zero under that pessimism layer, the deal survives contact with reality. Mine didn't on day one. It barely cleared by month eight. The triplex on Nicollet eventually earned its place in my life honestly, but the green cell gets no credit — every good thing came from the red-pen version.
HOUSE HACK FINAL v9 stays wrong on purpose
I still keep that laptop. Different table now, an actual desk snagged secondhand off Facebook Marketplace for $65. Sometimes I open HOUSE HACK FINAL v9 just to look at it. The file stays exactly as wrong as the night I made it. The building got right.