Currently 7 of the 13 units are ready to be rented and the others need a little work.  

If I can determine precisely how much energy each living unit consumes, then I could pay the power bill and bill each tenant accordingly. 

I know that having multiple properties through financing has it's benefits in a normal scenario but from what I've read I could have some issues with UBIT if I do that since I'd be using a self directed IRA.So having said all this does it make sense to move my money out of Betterment and use it for rental property investing?

Bond for Deed must be French Law.. never heard that term in my 44 years of real estate.I am assuming its a debt instrument like a mortgage or deed of trust.Zero % financing is great.. as long as your not paying double what its really worth.with those terms it leads me to believe that the seller is tired of managing this and the management could be Hi touch lots of work.. so if you think your ready.. that s a pretty decent deal in my mind..

You need to have cash on hand to be ready to make offers.

I’m not ready financially to do so today. 

I still need paint, carpet new linoleum in the kitchen and tub/surround in the bathroom and it'll be ready to rent.I've got a HELOC on this house which helps tremendously.

These folks are often ready to downsize or transition to assistance.

However, they were interested in my offer as I was ready to pay full price (and perhaps a little over).

Oh i am ready lol its giving the wife the security thats always hard😂 my agent says duplexes are rarely on in my market as well