Hi ,I have a 2008 holiday Rambler Neptune and just replaced my resistor that sounds like part of your trouble , it isnt easy but doable ,easy if you have the right size screw driver , you just have do it blind and feel , I could prbably do it in 45 min or less now. after doing it once it will be a lot easier next time. Not sure about your blower motor but they can be removed and sprayed with wd40 , mine is located above the generator very easy access
Good luck