Im pretty sure they are illegal in Georgia...at least that is what a guy at a LFS said in Alabama...I asked for a FW ray and he said you from Georgia cause they are illegal over there..
The smallest commonly available ray is P. reticulatus. A tank with at least 30" width is need. However, adults are RARE because of the fact nearly ALL die before adult hood.
If you are serious about rays the best thing is a motoro in a 180 for a year and then into a 300gallon rubber maid pond.
Also remember rays are $$$$ to buy, $$$$ to house, and $$$$ to feed. Do TONS of research before you buy or you will have a couple dead rays before you know it....