This is doable however my time to find, procure, and renovate rentals is very restricted due to my life on active duty.When looking strictly at the numbers a mortgage provides a better CoCR and a better ROE, but stepping back and looking at more plain facts it seems like leaving the house paid off is the best bet, thoughts? 

I am procuring deals right now that are cashflow positive in the first full year.

They are always looking at ways to improve their operations: being vertically integrated (as is BAM), but they go above just managing their own properties to actually procuring many of the finishes for their renovations direct from manufacturers.  

Navigating procurement has taught me the art and science of negotiation.

That being said, the more important factor to consider is time to procure items.

With him being able to live with us rent free while still making a decent amount of money for being almost 22 and good spending habits, is it worth exploring options to use our situations together to procure real estate in some form or fashion?

Real estate agent, wholesaler, material procurement, GC, etc. 

A real estate broker, for the purposes of this article, is defined to be a person, firm or corporation who, for a fee, commission or other valuable consideration, or by reason of a promise or reasonable expectation thereof, lists for sale, sells, exchanges, buys or rents, or offers or attempts to negotiate a sale, exchange, purchase or rental of real estate or an interest therein, or collects or offers or attempts to collect rent for the use of real estate or solicits for prospective purchasers or assists or directs in the procuring of prospects or the negotiation or closing of any transaction which does or is contemplated to result in the sale, exchange, leasing, renting or auctioning of any real estate or negotiates, or offers or attempts or agrees to negotiate a loan secured or to be secured by mortgage or other encumbrance upon or transfer of any real estate for others, or any person who, for pecuniary gain or expectation of pecuniary gain conducts a public or private competitive sale of lands or any interest in lands.

AZ has some very stringent construction defect suits and is the hardest state to procure GL for a GC.So you are taking an extremely high risk by working with uninsured contractors.

I traded some private coaching for his son in order to be able to purchase any multifamily unit of his that he has procured in a recent buyout from another aging investor.