You can watch closely to see if it is something you would like to do on future properties.

You are free to build whatever you want, sell the house once is finished, and the lien-holder (original seller) is paid off through title when the new house sel The seller is wanting us to build him a new primary residence.

It might make the most sense to just sell your primary residence and use it as 40% to 50% down payment on your future home. 

I manage 400 rentals and the most significant claim ever filed was a kitchen fire that cost $20,000.

This house-hack will be a negative cash flow while I live in it, fix it up, etc. 

I net about 3.5-5k a month(depending on airbnb) after all expenses including my primary residence and utilities there.I have built up a good amount of equity in the houses due to the renos I've done mostly myself and also from buying low during covid.

Set a utility usage cap that is stated and agreed to in your lease agreement.

If you can't find people to live in the house, that's the risk you have to take.

Family becomes brutal when its time to split up land or decide what to do, plus with the heirs laws you or your siblings kids have rights to the property.

Some people will push to get the maximum, even if it means they may wind up with nothing.