Wow, that is NOT great, you would get better results from calling the phone book eve on a first pass.

Use a free Google Phone Number for Leasing and Marketing your rentals. 

The phone is your friend.

Shoot me a message for her phone number!

The contractor who put in the floors is not following up on phone calls or promises to review the work he did and see if something was done wrong.

If each building belonged to a different owner, the only thing that they would have to collaborate on is, obviously, the courtyard (gardening, each side has it's own sprinkler system) , the intercom (about $120/month for the phone line), and the parking area (needs resurfacing).  

Try calling from a different phone if they aren't picking up when you call. 

One reason I’ve brought this up is I’m getting more and more phone calls asking for help because their plan was to refi and they can’t. 

Don't give up, not everyone who answers the phone knows. 

You put a "for rent" sign in the window with a phone number.