PMs have different contracts, and some may be more restrictive than others in what control you have. 

Leverage is a force multiplier: It can move a project along quickly and increase returns if things are going well, but if a project’s loans are under stress – typically when its return on assets isn’t enough to cover interest payments – investors tend to lose quickly and a lot.As a general rule, leverage should not exceed 75% of the total property value, including mezzanine and preferred equity, because both of these types of debt sit ahead of common equity in payment order.

As I understand the rule of transferring into a trust, you cannot have the mortgage called if you put property into a TESTAMENTARY trust. 

There are rules about how bank accounts can be set up and so forth, but that comes down to state/local law level.

I'm not a realtor so I don't know your rules, but I wouldn't use the normal realtor contract, causes it says prop can't be assignment without written consent from seller, unless you have written consent. 

Home Possible does have certain qualifying income restrictions depending on where the property is located but some areas on the north side have no income limit.

or do you just rule out wholesale, mls, auctions, flips, hard money, and anything needing repairs and buy near retail for a hold?

Someone earlier put up a link to the FHA rules so maybe they will stop by and post again.

The code, regulations and rulings do not have any specific holding period. 

I'm not sure what else I can say here without breaking the BiggerPockets rules for forum posting.