In most jurisdictions, the legal notices and eviction paperwork should state the name of the person(s) who signed the lease agreement and "all other occupants".  

Depends how quickly the title company is able to push the paperwork or how quickly you can push the paperwork at the clerk's office. 

You don't need to do it right away, the title company can prepare the paper work at closing.

What he is likely saying is that lenders don't like to waste their time doing all the due diligence and paperwork for smaller loans when they can do the exact same work on a larger loan and make more money, thus, any loan is likely easier to get in the $250k range than it is in the $90k range.

Getting a low down payment loan for an investment property is essentially impossible.  

If we get it under contract, get all the proper paperwork with him filled out, he transfers the deed and puts a lien on the property, can we turn and sell the property to another buyer as an owner carry?

Some of the REITs I have heard or read got started was by amassing a large portfolio and then essentially selling it to potential investors.

Since that time 3+ years they now count it as income.I now have two 4-plex's in addition to two rentals, we have put larger DP's on them and the banks count the expected rents as income when doing the loan paperwork.  

The buying and selling can be done with little paperwork.

The LOI  essentially states "This letter is being written to convey my (or my wife and I's) sincere interest in purchasing your home/property.