Anything sounds better than the winter in the Upper in a trailer!!!
Florida is fine if you're pockets are deep.
Texas in Brownsville area is good.
Deming nm only sees about 3" of snow, but can freeze pipes buried shallow.
Southern az seldom freezes.
California desert is swimming weather in the hot springs.
Some tips:
Come across on I-10 or I-40 when winter traveling headed to AZ.
Forest service has road use maps that show roads you can camp along 14 days, no charge. Any fs station has those maps gratis.
The west is more RV friendly, that is the reason I seldom leave AZ with my RV. Free camping on BLM land can easily be found from I-40 down to Yuma that will keep your RV from freezing.
California has some of the highest prices on fuel, (and everything else). If you're liberal you will likely enjoy California, those that aren't, Can't get out fast enough.
I stay in on BLM LTVAs for 6 months a year (the permit is for 7 months, for 180 the season). Depending on location water,dump station, and trash dumpsters are provided, for that fee.