I have used  a couple non-remote accessible keypad locks on my personal residence but have not added them to tenanted properties.

I am also open to considering opportunities in the Riverside / Five Points neighborhood, or San Marco, in Jax.Ideally, I would like to find a livable property with 3+ beds / 2.5+ baths, make use of FHA to purchase, and rent out 2+ rooms while renovating into separate, complete units.

Your lender should use the f/f that can finance the property.  

Let them know how much you value their property and ask if they’ve ever considered selling it.

I imagine people who've had 2nd or 3rd houses in hollywood hills are not interested in rebuilding or doing the work.  How do I go about finding those who'd rather just collect the insurance money then sell it off at a...

You have to be willing to sell your properties and access the equity to buy up. 

What are other high net worth individuals paying in broker commissions these days, for high value properties?  

In a handful of years you've got a few properties, and you're on your way. 

Nevertheless, if the RAD investors  actually had loans  collateralized against property they would be in a much better position.

My question is can we create a LLC for her and Dscr refinance our current property into it to free up my dti?