This sale would not qualify for 1031 exchange right?  

A PCS would obviously qualify and what you are asking is if your specific situation qualifies as well. 

Does the LLC loan count against our ability to qualify for a personal residence?

if i qualify for the 0 down house (since I would then own the land) what would the monthly payment be?

In the mean time, I rent the property back from them while I am looking for another investment property.It's a win win situation for both of us because he doesn't have good credit and not enough income on paper to qualify for a loan.

Under this federal law any financing arrangement requires the purchaser of an owner occupied dwelling (one to four living units) is to qualify for any financing contract with a registered Mortgage Loan Originator.

I'm not even sure if I qualify or should be looking for a duplex, as I have a income problem (I've worked, just haven't made enough).

I have to wait until 2019 when I have 2 years of self employment income to qualify for a mortgage. 

If as the landlord you can save time by having to answer every single tenant call, going through the qualifying questions, getting all the documents, etc... why wouldn't you.

In other words, if somebody qualified came up and knocked on the door, could they move in the next day?