I just googled Child Cares in metro Atlanta and although centers appear in several of the listings, I can see scrolling through them that there are several houses/family child cares for sale too... There were quite a few links to click on when I googled and I only looked at the first one so there might be some hidden gem in other links if you keep looking....
Maybe start networking with a realtor specializing in child cares and spread the word...
Here is one
http://www.wesellchildcare.com/georg...care-for-sale/
It's definitely a unique market so I am sure your forever home is just out there waiting for you to find it!
Here is the first link I found
http://www.loopnet.com/georgia_day-c...ters-for-sale/
Here is the Google search results
https://www.google.com/search?ei=Gqq....0.MGAfIoc5o3g