@Dave RamirezCombining personal and IRA investments is very tricky to do properly, and much of what you seem to be outlining in your above post would result in self-dealing prohibited transactions that would invalidate the IRA and could result in severe tax consequences.

I would think that the liability and maintenance issues would be extremely cost prohibitive if not on a grand scale, but I could see the potential in forming a company that provides these type of services (auto, bike, etc.) to many different multifamily units for a set monthly fee, eliminating the need for the smaller landlords to provide the maintenance, insurances or liability issues.  

I prohibit in my lease open flames and gas heaters.

Google the above business name or PM me for her number, since posting numbers is prohibited here.

Three things you need to look at.A Power of Attorney statute in most states has a prohibition against "self-dealing" and a daughter selling her mother's house would be presumed to be self-dealing, regardless of having the purest motive in the world.  

For those who want to have better understanding of what is permitter and prohibited in specific zoning code.

Just keep in mind the prohibited transaction rules.

Also, the lower units may be below the area's base flood elevation, which would prohibit you from rebuilding them unless you somehow raise the house.

In Nebraska, the landlord tenant act specifically prohibits charging tenants for water service without having a separate meter. 

This prohibits paying unlicensed bird dogs/wholesalers to bring you deals.