Rental Property in Augusta, GA

[Jack Forester]

I'm in the due diligence period on a property in Augusta, GA.  It has the current owner's house, a 1 bed/1 bath house, and a duplex, all on one tax parcel.   It's zoned R-2, which is two-family housing.  I called zoning and they confirmed, due to the age of the buildings, it's deemed "Legal, non-conforming".  I'm attempting to get that in writing.

Is there anything else I need to do to make sure I can legally rent this after purchase?

Thanks!