I had a RWD car in Texas that was poor in rain and a variety of other conditions.
I had a FWD Rav4 in Texas and it was absolutely fine for city driving.
We then purchased a AWD Rav4 and we found it to be very useful for driving the coastal beaches, and getting around some rural roads in the Hill Country.
If he is just going to drive the car around town, you should be fine with the FWD Rav, but if you do any off roading, or beach dwelling, then I would consider the 4wd, but it is not necessary by any means.
The gulf beaches have hard packed sand, and all types of cars drive on them with no problems. You would only get into trouble if you went into the dunes, and most of those areas are blocked for vehicle traffic anyways.
We drive our Scion on the beaches with no problem at all regularly.