Tenants will push and try to get everything they can from their landlord.Seems you've done everything possible to be reasonable, yet the tenant is not satisified and wants more.As already stated, you are too much of a pushover, so the tenant is seeing how much farther they can push you.Highly advise you to find an experienced residential landlord-tenant attorney ASAP.

So, having a trusted and experienced Realtor to provide you with an evaluation would be a good start to helping you really assess your options.First, I would ask you what your ultimate goal is...? 

I get the impression they were once a better company but are experiencing growing pains. 

I wonder if people become experienced in real estate - unless they stop growing.

Can anyone recommend an experienced landlord-tenant lawyer in the Atlanta area for me?

I think the OP is lucky not to have experienced catastrophic failure yet.

Experienced teams should have network to avoid such outcomes.

In a rapidly-rising interest rate environment (such as we've recently experienced) that tradeoff may or may not pay off.Unfortunately, in CRE finance there is no perfect financing vehicle and you can't eliminate risk--you must choose which risk you want.

If so how difficult is that?

Happy to make acquaintance with any agents or experienced investors in these markets.Thanks Holla!