Gordon, you must be slow if you had problems. What's so hard about being an RV tech? I have a motorhome and have no problems. (I WISH) You have to be an automotive electrician, a "house" electrician, (and if you don't know the difference you'll be dead soon), a plumber, a refrigerant/AC repairperson, a furnace tech, a truck mechanic, automotive bodyman, cabinet maker, upholsterer, van conversion genius, woodworker, glass installer, propane appliance whiz, awning repair person, electric step and fire tech for smoke alarm technician, need I go on? You also have to able and willing to work with your arms and legs in positions and places that are FAR WORSE than anything on your car or home. Plan on not having any light to see anything. Hope to God the place doesn't stink and that Fido was wearing a flea collar. Learn to diagnose mold locations with your finger in the air because you'll never find it by looking.
There's nothing so precious and rare as a qualified and quality minded RV tech because it's just too danged much to know. They should be carried in parades on the backs of us lowly RV owners most of whom don't know how lucky we are that we are motoring down the road and able to have fresh water, cold drinks, a warm house, plumbing etc etc etc.
Oh and one more thing, you also have to have a huge amount of tolerance for the people and patience in repairing something the "homeowner" has already started, ah...and not been successful at completing! And any repair that needs doing...you need to have it done before they have to fix lunch. Long term problems or preventive maintenance. Just resign yourself to the fact that they are NOT going to come by in February. They'll see you the Thursday before Memorial Day. Every one of them!
Gordon...my hats off to you!
Del