was wondering if anybody had thers rear suspension(bushings, centric cams, airbags, complete brakes, air lines and valves, bags and brakes)replaced , i was just given a estimate of 7000.00 to do the complete rear unit , the reason for the complete is the coach had a major fire in the engine , i dont want to give up on it,it is to nice of a coach to use for parts,its a 1984 40, can anybody give me any advice , to much or ?