Earlier this month we were just east of St Louis MO in Indiana when the fan clutch decided it would engage permanently. We stopped in Granite City IN and started calling around for a repair shop or mobile mechanic. CG Hosts gave me several numbers for mobile rv repairmen but had no mobile mechanics. I finally called the local Chevy dealer and they couldn't work on a MoHo for a week but recommended a mechanical shop.
Long story short, truck repair shop with about four or five RVs sitting around. Owner is a pilot but loves RVs and when I told him our needs he got us in right away. $250 and one day later we had visited the park at the beginning or the Lewis and Clark Journey, saw St Louis, ate several local specialties and meet a really great SLFD Captain at the Old Spaghetti Factory where the firemen were working for tips, instead of passing the boot for donations to a local charity.
That side of the Mississippi is devoid of RV repair shops, but they have at least one great truck shop with an old German owner who likes airplanes, rvs and people. That is where I look for mechanical repairs and try and fix the house stuff myself. The internet has help for most house repairs.