I'm working on doing an ADU up in Saint Helena, my mother has a house there and we'd like to rent it out while using the ADU.

His mother lives in one unit and rents out the extra bedrooms and the other unit is a 3br 1bath apt. 

There are 12 studio apartments behind the old nursing home on South Main street.

@Kevin Zheng   Dollars and cents aside - what is best for your mom - there's pro's / con's to all 3You're asking a somewhat vague question as there are lots of things to consider - such as how much money she has (will she outlive it and eventually go on govt assistance -- the answer to this really could help you in your search for an AL facility or SNF (skilled nursing facility) --- What are her present needs - how is her health - what does she need help with presently?

Traveling nurse or med students maybe?

I've done it with my mother in law and it turned out great.

The financing option was:1) 5% owner occupied2) 25% investment purchase with 5% from us and were going to get the remaining 20% down from mother-in-law HELOC.

improvements, plans, permits, rent rolls, schedule e, T12, proof of deed, homestead address, mothers maiden, lol whatever you can get

Had to find a home to accommodate both me and mother.

Last year my grandmother sold her condo because she was no longer able to live alone; she is currently living at her sister's house until we can find a more permanent solution (was originally hoping for a nursing home, but she is opposed to that idea).