Here in south Austin, there are two mobile RV techs that people here at the park speak highly of. RV Specialists - (512) 470-3070, and RV Technology - 512.243.9700.
The nice thing about the mobile repair people is that they come to you! No worries about dropping off your rig and waiting forever for a repair. They come by, figure out what they need, come back and repair.
I have not had work done by either, but have called and talked to both, and have heard good things from people here in the park. Short of major chassis repairs, I would think that a mobile repair facility would be a good option for fulltimers.
Also, as mentioned at The Gathering, be sure to have a look at
RV Service Reviews to see if anyone before you has had horrible experience.
--kev