Quote from @Roger Flot: I was reviewing some renovated listings in my area and one indicated that even though the house was originally built in 1920, because of all the renovations bringing the house to current code, that you could get 2024 rates on insurance. 

I used one that was recommended on the next door app with highly rated reviews, but they did a horrible job on my primary home. 

What is the cap rate?

You can then rent at market rate but have to register it with the town annually and abide by their annual inflation rules.

Looking for a house we could house hack, had an incredibly low interest rate on mortgage and house has increased in value about 42%, an estimated 180k in equity.

Quote from @Pat Aboukhaled: Curious.. do you think a flat rate for the whole season feels more convenient, or would you rather pay per snowfall to avoid paying for a mild winter?

In San Diego at the current rates for a purchase loan (which has better rates than an ADU additions) at high LTV, I show 1% does not cash flow on a sustained basis.  

If I can park the 388k ($415-27k) for one year at CD rate of 4.5% and then est 300k (after paying cap gain/depr recap) at 3.0% (assume CD rates lower) that interest income of about 24 months net of ordinary income tax is about the same as my current mortgage.Trying to play devil's advocate and think why selling this year does not make sense. 

A DSCR loan only removes the income piece and adds a slightly higher rate and prepayment penalty.

Or a seller finance calculator showing the monthly payment based on negotiated price, interest rate, down payment, etc.