Have fun during your travels and welcome to the forums. I have found that people who full-time or just spend a lot of time on the road need to be handy. My DH and I are anything but handy so we are recreational RVrs.
Traveling in a 28-footer and buying a house somewhere like Tucson for the winters sounds like a dream-come true. I think the DH would have a cow if that was suggested to him, lol.
Whatever you do and whatever you buy, it will be a great experience, I'm sure.