I just googled Mobile RV repair and found this in Memphis
http://www.pro-rvmobilerepair.com/index.html
I have never used a mobile service but know many have and had good success. The guy parked next to us last week in Ashville had one replace a bent axle and all the wheels and tires, and repair a genny on a Carriage fiver. All done right on the site.
Call DT first to get approval for cost coverage. They should cover it all since the great dealer support is NOT so great!!!
Cheers,
Bill