I've owned RVs since 2005 (2 TTs, and now a motorhome) and none of them have ever been to a dealer for service. Although most of my repairs have been DIY, I've used independent shops plus a mobile guy and have never had a bad experience. My biggest repair was repairing the back, right corner of my second TT after I was rear-ended (not my fault), including an axle replacement, fiberglass repair and a new water heater. I think it was done in a week or so. That one was expensive but was covered by insurance.
My latest experience was a slide repair by a mobile guy. My MH's bedroom slide was tipping out when being retracted in addition to making a horrible noise. He met me at the storage yard with his son, diagnosed the problem (a broken stop/hold-down bracket), ordered parts from HWH, came back after the parts arrived and had it fixed in about an hour. My total bill was a little over $400 and I didn't have to take or leave the MH anywhere.
I also have an independent truck shop that's done right by me including a mobile service call after getting towed to campground. Prior to the call, the owner and his son spent about about an hour on the phone with me, after hours, diagnosing the problem at no charge. The mobile service call was expensive, I was about 2.5 hours away from home but my camping trip wasn't interrupted, and, if I'd elected to have been towed into the local town instead of the campground, I'd have had motel bills, etc. All total, I think it was about $800 for both travel time and repair cost.
For anybody in the Sacramento area, the truck shop is Mike and Sons Truck Repair:
https://www.mikeandsonstruckrepair.com/
And the mobile guy is Eagle RV in Galt, CA:
Mobile RV Service and Parts - Galt California
My only complaint is that DIY guy takes so long to get things done and sometimes has to do it three times before it's right.
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