How Florida Families Are Using Home Sale Proceeds to Build Instead of Pay Rent
5 min read · Jax Tiny Homes
Your parent just sold their home for $400,000. They're standing in the kitchen of an assisted living facility, holding a price list that says $5,000 a month. The math gives them 67 months before the money runs out.
After that, someone else is writing the check.
The Two Paths
Path A — Assisted Living
$400k in. $5,000 out every month. By year five, $325,000 is gone and $75,000 is left. By year seven, the account is empty. By year ten, the family is covering it.
Path B — Backyard ADU
$400k in. Spend $180,000 building a 1-bedroom on a family member's lot, paid in cash. $0 a month in housing costs after that. By year five, $220,000 is still sitting in the account. By year ten, the money is still there — and the ADU is worth $230,000 or more.
One real example
A mother sold her Riverside home for $385,000. Her daughter had a lot in Mandarin. They built a 565-square-foot 1-bedroom for $172,000 — paid cash. Mom still has $213,000 in the bank. If she'd gone to assisted living, roughly $325,000 would be gone by now. Same family. $325,000 different outcome.
When there's no home sale — the HELOC path
Not every family has $400,000 in proceeds. Some parents are renting. Some already spent their savings. The math still works — it just uses a different funding source.
One example: a daughter in Ponte Vedra had a parent paying $3,800 a month in rent on a fixed income. Her mother had $60,000 in savings. The daughter had equity in her own home. She pulled a HELOC for $120,000, her mother contributed $60,000, and they built a 1-bedroom for $172,000.
The HELOC payment runs about $900 a month. Her mother's rent: $0. The $2,900 a month her mother was spending now covers the HELOC payment with $2,000 left over — going back into savings every month. In three years, the HELOC is mostly paid down. The ADU stays on the property permanently.
What happens to the ADU when the parent passes
It stays. It doesn't evaporate. Your property is now worth $80,000–$120,000 more than it was. The ADU becomes:
- A rental bringing in $1,200–$1,800 a month
- A guest suite for visiting family
- A home office or studio
- Part of your home's resale value when you eventually sell
One thing to check before you do anything
Florida has a 5-year Medicaid look-back period. If there's any chance your parent might need Medicaid down the road, talk to an elder law attorney before a home sale or any large transfer. That's not legal advice — it's just a real variable that comes up in almost every one of these conversations.
Want to see what your family's specific math looks like?
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