3 building purchase, possibly one free and clear at closing?

[Jesse Aiken]

I'm re-visiting a lead that came across my desk a while back. I was hesitant originally because I was looking for more equity in order to help me scale. I thought of something I hadn't considered before... 

It would be a 3 building purchase of a 4plex, 3 unit, and a single. I am wondering if it would be possible to obtain financing for the 2 multis that would cover the cost of the single and walk away from closing with the single free and clear without having a mortgage on it. I could then get a Heloc on the single that would basically replace most of the down payment and purchase costs for the deal.

Seems like something like this would be unlikely because I wouldn't actually own the building in question prior to closing. I don't know if it would be possible and would need to talk to lenders of course.  

I'm trying to find a way to preserve capital in order to scale. I'm just brainstorming and wondering if anyone has any experience with something similar or has any ideas. I appreciate if someone could share some experience or ideas. TIA!