We need a car for this summer

Judy and I will be in the US this summer, we will arrive in GA on June 22nd, travel to FLA, TX, KS, NC and back to GA (and maybe a trip to the north east) then we will fly back to France on Aug 22nd. We will need a car, either to borrow or buy for these two months that we will be in the States, if you know of a possibility, please let us know. Thanks so much.