Unless there is some legal or mortgage rule against doing that, that I am unaware of? 

I know this is done all the time, but how is it legal without the seller being a Licensed Loan Originator?

Add to that short term rentals (less than 30 days) aren't even legal in Clark County. 

Also, some of the information you'll find here may not be accurate (legal) in your state.

This is better than a Virtual Assistant because it is written by a lawyer, it takes me maybe 5 minutes to email him with the details, and when it's done it's a good looking, professional legal document that cost me nothing.

Also keep in mind that the seller can accept a back-up contract even while your contract is in place...it's not that uncommon and it's perfectly legal. 

Language in the deed, the legal description, where the current owner received title may yield a clue also.  

I found wholesaling contracts here on BP but am not sure if they are completely legal here in New Mexico.

Many times marital statuses are missing, legal descriptions are incorrect, or there is other missing or incorrect information that causes issues in future transactions.

I think you should leave him off for now, and create a legal ownership and distribution contract so things are clear on the business and money side of things between you, and his not being on the LLC wont be a detrement to his part in the business.