In my apartments one apartment could not even control the heat. 

So I am 27 been taking care of my parents and family since 18.

You want to basically develop a "parent" company to manage both of these divisions, or separate LLCs. 

Greater than 4 housing units in a building classes it as commercial.Building codes are usually controlled at a county level and vary across our country.

You can always be extremely picky and be looking for the pet parents that show up with a microchipped pet, happy to provide you with up-to-date vet and vaccination records, letters of recommendation for their dog(s) and an offer to let you meet the animals. 

In effect, anyone who owns a home or wishes to own a home has control over you and your ability to invest.Hence my comment about self-imposed rules. 

I prefer to stay in control, and if a judge thinks I've overstepped my boundaries we can discuss it then.  

Trust provides more control and flexibility in planning.

For a SFH, this is not as much of an issue as it is for a apartment community because for an apartment community you need to know (control) who is in there to get your best returns when renting the other units--not so for a SFH.Good Luck! 

Unfortunately, term leases give the control of your property back to the tenant.