Tomatoes are tough down here. Years back I tried for about 5yrs straight, each year with more effort to stop the bugs. I tried pesticides (alot. Way too much. Probably took years off my life from the ones that did make it). I tried netting, hanging them upside down, etc. I finally gave up.
Ive been told that in the south, you either have the right spot to do it or not. My neighbor grows them by the bushel and gives me some every year. He does them with biodynamic gardening (i.e, a pile of $hit). Each year he does one plant that yields thousands and is anywhere from 6-10ft.