East Sacramento · McKinley Park · September 2026
A 1939 Spanish-style duplex. Two couples thinking about buying it together. One honest question: is this a family home base, an investment, or both?
Part one
No jargon version: the two couples pool cash for a quarter of the price, and a bank lends the rest. Tenants help pay the bank back.
Each couple puts in $137,500 toward the down payment, which is 25% of the price, what banks usually require for a rental. Add closing costs, loan fees, the legal agreement, and furniture, and the real check to start is about $160,500 per couple. The box below itemizes it.
A bank lends the remaining 75% at about 7.5% interest. That is higher than a normal home loan because the owners will not live here full-time. Banks charge more for rentals. The monthly payment is $5,769, fixed for 30 years.
Rent from the two units covers most, but not all, of the bills. Part of every mortgage payment also quietly pays down the loan itself. That slow payoff is called amortization, and it builds the owners' equity.
Part two
The duplex has two front doors. Each one has a different job.
A regular tenant on a standard 12-month lease. Boring on purpose. This is the dependable half of the income.
Furnished, rented for stays of 30 days or more (think travel nurses on assignment) for about six months a year. The other six months it stays open as the owners' home base for family visits.
The plan: self-managed at first. The marketing stays in-house, and family in Sacramento can help with handoffs. Budget a little for proper leases and legal review.
Part three
Here is the honest first-year picture. The building brings in less than it costs, and that gap is the real price of admission.
What each couple writes a check for, every month, in year one. The rent does not cover everything. About $49,000 a year is missing, split between the two couples. Property tax grows slowly (about 2% a year, thanks to California's Prop 13), but the mortgage payment never changes.
Part four
Same numbers, two reasonable conclusions. Both deserve a fair hearing.
The case against buying
The case for buying
Parents get older on a schedule nobody controls. A key that always works, a bed that is always made, a kitchen ten minutes from the people who need you. Some years, that is worth more than any return.
Part five
Three worked examples, not predictions: a careful case, where the market stays as slow as it has been; a sunnier case, where things go well; and a better-deal case, where the price is negotiated down to $950,000 and the loan is refinanced when rates ease.
Tap a card to switch every chart and number below to that example. The index fund band always grows the matching down-payment cash at 5% to 10% a year.
The dips in the green line are vacancy, the empty months we assume on purpose: two when Unit A turns over (about every fourth year), and one unfilled month of Unit B's season every third year. Watch the gap between the lines narrow as rents climb against frozen costs.
Blue: the down-payment money sits in an index fund instead, drawn as a band because nobody knows future returns. The bottom edge assumes 5% a year, the middle line 7.5%, and the top edge 10%, about the market's long-run average. Green: the owners' net position in the duplex: the value of the building, minus what is still owed to the bank, minus every dollar of shortfall the couples had to feed in along the way. With the repairs fund and furnishing counted, the duplex trails the whole band in all three cases. On the careful numbers it ends slightly negative: more cash fed in than equity built. The better-deal case is the only one that ends in the black, and even it stays under the band. The bet only makes sense if the home base itself is worth that difference. Hover or tap any year on the chart to see that year's sale-day math: sale price, bank payoff, your check, and what was fed in to get there.
Plain words
Every term used above, explained like you'd explain it at the dinner table. Tap one to open it.
The bottom line
First, the context: what home values did over the past 12 months (Zillow).
The region is falling; East Sac is its strongest neighborhood. That supports paying for this location, but not counting on a rising tide. It also means the leverage in a negotiation belongs to the buyer.
Being near family for the next decade is the point, each couple has about $160,500 to put in up front, both can comfortably spare ~$2,045 a month without resentment, and everyone signs a written co-ownership agreement and proper lease contracts first, covering exits, buyouts, and who calls the plumber.
The investment return is the point. At today's price and rate, the careful math favors the index fund. A lower price, a rate under ~6.5%, or proof of stronger rents would change that answer, and the listing has room to negotiate.