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I would think their loan documents give them the right to control the property after the original owner dies - regardless of who is living there (although I have no direct knowledge of the laws where you live).There are details we don't know here... like if you want the house for sentimental reasons, or because you see the value between what it's worth on the market today and what the reverse mortgage company wants for it?  

If you add unit to your home, your home likely became rent controlled.  

I wouldn’t go there myself… you lose a lot of control, your house will see a lot more traffic / damage.  

Totally out of control.

SFHs are largely exempt from many regulations such as rent control.

Friends and family.Current and previous coworkers.Spouse's current and previous coworkers.Children's and/or Parent’s friends and family.Neighbors.Members of your church.Doctor.Dentist.Handyman.Landscaper,Barber.Hairdresser.Accountant.Mechanic.Pool guy.Dog groomer.Day care provider.Mailman.Banker.Little league coach.Snow plow guy.Your sphere of influence is the most likely place to get your first sales.

If someone made $50K assigning my elderly parents or grandparents home to an investor in a subject-to deal, and that investor ruined their credit by not making payments, I would do everything in my power to go after that investor, AND the wholesaler, and I would make both their lives a living hell to the best of my abilities.

This targets family’s between homes, either because they just moved to the area; have a definitive time work contract; current house is being rebuilt/remodeled/repaired; students with “rich” parents; recent separated/divorced who needs space for children visits; Houston medical center stays; etc.  

If you stayed with your parents for $0, then you have say, negative cash flow of $1,750.