Anyone make a mistake buying first MH ?

Not counting our 9-1/2ft camper, our first MH was a used 1977 class C on a Dodge 440 chassis. We bought it in 1989. The interior was a major project. Re-finished all the cabinets, rebuilt the genset, re-upholstered the interior, new mattress, bigger tanks for dry camping, etc. On the outside/chassis, the darn thing would do fine until we towed our boat. Then it would vapor lock and get a whopping 4 MPG. We'd have been better off getting something new/newer. Anyway owned it with my dad and we sold it about 5 years later. We did, however, get out money back/out that we put in it.