Sorry about your issues. Many of us on the site have similar experiences. I live in GA and was fortunate enough to have a huge independent dealer honor Keystone when I needed it and the ONLY Keystones they sold/sell are Raptor/Fuzion.
When in AZ we had an issue with our HW heater. Tried all the common approaches as recommended on this site responding to my "call for help"... no luck. Finally called a roving RV Tech, recommended by the RV Park where we were staying and he fixed it. Was a broken wire for me. (worked on gas). No more issues.
If you have any RV parks in your area, you may want to call or visit their offices for possible low budget advertised techs that they might refer. Scope out your internet tools as well, ie, Google. Also perhaps people who respond to your post have someone they can recommend.
I am 70 and was NEVER a techy person. Always had toys; boats, motorcycles, etc. Fortunately I was paid well enough and lived in areas with techs around to care for the toys. NOW, retired and stretching my dollars, AMAZING the non electrical tasks I will take on.
Travel safe and often.