There are very few hard and fast RULES, they should be seen more as guidelines .  

Are all the units even legal?

I'm currently trying to sell it, and some strange issues have come up.The house is a single-family according to the County, but shares a driveway with two townhouses, and the developer set it up as a condominium complex in the legal description. 

Legally how much notice do we need to give them?

One way, is to set bandit signs if they are legal. 

If you ever go to enter your property, emergency or not, and the tenant has changed the lock, you are within your legal right to have a locksmith come and change the lock on YOUR property.

If true, what are the guidelines and how to do this process remotely?

It seems like a headache to update legal documents knowing I’m going to move often using my personal address .

In some states it's also difficult to market your contract legally.

I thought Forbes did a nice job on this article over the weekend and wanted to share it here on Bigger Pockets because it seems to capture some big ideas that may take a lot of digging to find otherwise and lays them ...