I believe there may be some additional stipulations with short sales regarding the time-frame frame for which the agent/investor must maintain ownership before resell. 

my wife and I flipped a house with another investor And that went well. We are will be closing on our first two family at the end of January. We are both employed and are working to purchase several more properties in...

We realize that as a PM, we are part of the ownership team.

My agent said if I want to buy the house with the tenant staying in the house, then I do a rent to own contract for the tenant, that he could be paying toward his future ownership and I could clear over $250 monthly.

Maybe it is over money, ownership interests, or if the stakes are high enough it could be over people.

The property has a mortgage on it but I used a quit-claim-deed right after the purchase to transfer ownership to avoid any liability issues.

The municipality subsequently passes a by-law which requires any house in the area still remaining on its own water or sewer system to be required to connect upon change of ownership.

A property needs to be seasoned by 5 years when transferring ownership to a family member that is in a long term care facility.  

If the HOA president sells his lot and ownership of the bulk moves to a new investor, and individual people like myself choose to opt out of "piggybacking," a huge issue could arise: the new investor creates a special assessment on dues and/or sends monthly dues prices through the roof, and we missed our window of opportunity to get out.

I've never heard of restraining any owner from their home prior to foreclosure, default doesn't extinguish ownership rights of anyone who has legal title.