I have a longtime shop I have always taken my vehicles to. They always worked on my clipper (21ft), but they only had one lift big enough for it, so timing was a big concern. They also worked on a fleet of commuter vans and often got fulltimers needing work done. I'd give them the dates of my next planned trip and say "as long as I get it back a few days before that, I'm good". That worked well as they could prioritize and get that fulltimer back on the road as quick as possible or get the van back in service before tying up the lift with my rig.
Several years ago, the owner sold the business to another local shop. After about 2-3 years, they stopped working on motorhomes altogether. Their reason was "their insurance won't let them do motorhomes". I suspect the new owner just doesn't like dealing with them.
My last trip out in the motorhome, I had to have it towed home due to ignition issues. Tow companies will no longer reattach the drive train on vehicles - they claim it's due to torque specs. So I needed to find a mechanic to reattach it so I could deal with the ignition.
I called about 10 mobile mechanics. Most refused to take the job because it's "too old". One, stated,they won't do drive train work at all. Finally found one willing to do it. 10 minute job.
I now have a neighborhood guy who does work on old vehicles. He is always happy to work on it. I don't know what I will do when he can't do the work anymore.
It is definitely getting more difficult to find shops able or willing to work on motorhomes. And if yours is an older model, it's even more difficult than that.
1975 American Clipper RV with Dodge 360 (photo in profile)
1998 American Clipper Fold n Roll Folding Trailer
Both born in Morgan Hill, CA to Irv Perch (Daddy of the Aristocrat trailers)