Before I list the financials, I'd like someone to answer: When a balloon payment comes up, and assuming I have these properties producing for me, will a commercial lender open a loan for all three together?

They can help you with all three.

It turns out they got three other offers over the weekend, so making a conditional offer probably would have hurt our chances anyway.  

After I'm completely done, it should be three times the purchase price. 

IT is extremely frustrating to read a ongoing report of a inexperienced landlord being played by a tenant for three months when the simple solution was an eviction.

Three smart guys.  

I own three income properties in other states(WA).

Rather than trying to be a wholesaler in either of those areas, consider buying a good deal from a wholesaler, and then, fix and rent.You could build a nice portfolio of cash flow rentals in both those markets, manage it easily from Gravel Switch, and get the brass ring everyone seeks in this business - passive income.Just something to consider.

And yes, mention the other three units are occupied by quiet older adults who prefer not to be disturbed and guage the girl's reaction. 

One of the most effective ways to get deals is by following up with a seller two or three months down the road.