Like others have said every trip something breaks. Parts that failed mods, and upgrades I spent as much as the MH cost in 2004. Having said all that, there are some systems that have held up well for a 1996 MH. The slide has been trouble free which is electric with cables, the only thing I did was lube the rollers and adjust the pot on the motor. The roof top AC's are original and still work fine along with the furnace maybe because they are rarely used. The Norcold refer is original with a Dinosaur board, burner tube and ignitor replacement along with the WH with a board replacement. Steps are original, I had to straighten them out when I bought the MH and the control panel went out and was no longer sold, they wanted over $1200 for a new one. I solder in a new relay for $3.42 and it has worked fine for the last 7 years. Kohler genset was problematic and no longer works. The IFS cost a small fortune to repair over the years, but engine and transmission have been trouble free, just general maintenance. The maintenance, repairs, mods and upgrades over the last 18 years and 100,000 miles of travel added another .25 cents per mile over the cost of fuel. I don't know if that is higher or lower than others on this forum but compared to the cost of fuel, I don't think it is too bad.