There are cheap, effective marketing strategies like @Chris Piper mentioned and there are expensive strategies for people who have the money.

@Joe Fairless I've been waiting to see your name pop up here.  

The mortgage lender mentioned having signed leases from all renters along with a notarized letter for each property.  

Because you mentioned the house is in SC, I would call a local bank in Charleston.  

Hi, I always seem to have trouble with @mentions.  

"- little recycling symbol that says next to it "recyclable"------------------------------------------------------------------------------------------My business partner is a realtor, so I want to mention our license number to possibly reassure people that we're official. 

You mentioned the finishes on some of the units are quite decent, so let's say you go to Ikea and buy mid grade kitchen cabinetry, you'd be at least spending 4-5000 a kitchen.

I'm waiting until I pay off my primary residence and will likely put 50% down or something along those lines.I've heard that a single family will appreciate the fastest, but has more of a hassle factor in terms of managing it.  

If you wait 6-12 months you could refi at the market value (ARV).

That said, if your lease has no mention of this then there is little recourse.