You bet you will find work!! Anyplace that RVers gather, there will be someone needing some kind of work done! Especially in the southwest during the winter or any other place that the snowbirds flock too in the cold weather!
While we were traveling fulltime, ran into this fellow and his wife traveling with a tractor and one of those small freight cabs on the back and pulling a 5th. wheel. He was doing so well on the road, the just closed down their RV park in the Carolinas and kept traveling!!
The other thing to look into is attending large rallies. Again, if they see your truck/rig, you will find work!
I have told my mechanic up in Puget Sound to load up his truck and head south. He would probably make more money in the warm winter, than in the grey, cold drizzle of the northwest!!
Good luck and will look for you. In fact, will be looking up a mobile guy when we get to Newport OR in the next few days!!