(That does not mean every Realtor is good, just that all Ive encountered that are not Realtors are bad).I will leave it up to the lawyers to explain whether it is an antitrust violation.

once I am all paid off I would probably start buying again but leaving those 18 units free and clear to live off of.  

Perhaps the tenants gave only a tentative notice, in which case the landlord left open the possibility that the tenants would not leave. 

So if you're not looking for any advice other than a name of an attorney, possibly leave off all the backstory, post your request for a real estate attorney in the professional section or Atlanta and make it simple for everyone.

I'm assuming the decision to leave an easy job to work a better paying & closer to home position was a very easy one to make.

The town leaders will tell you that the young people leave here.  

When it's time to leave the area, you can hang onto to that multi-family if possible and do the same thing the next place you move to.

Here's my idea:  Whenever a current tenant of mine leaves, I will give them a manilla envelope. 

If fees are too low, I would suggest keeping them the same for at least one to two years, then slowly incorporate increases.If you pay cash, make sure that you have some sort of clawback ($$) for a certain amount of time if accounts leave in XXXX days.Will the owner stay a certain amount of time to help in the transition?

That would leave your 20k repair budget 15k profit, 10k for closing costs, carrying costs, and the remaining as a contingency for repairs.