We had our fridge
and burner cleaned and adjusted, stove burners cleaned, and old line under trailer flushed out and cleaned. The lines under the trailer had a black wax like substance in them residue from the propane. Some replacement smaller lines as the no longer allow joints inside trailer. Cost was about $100 then purchased new furnace
$1600 with install and new Water tank $425 with install all prices do not include tax's Also replaced all copper water lines with pex and new taps at sink and shower additional cost. Right now working on fixing cracks, etc. and gelcoat repairs plus new window drains etc.
P.S. I cut the hole for new water tank and installed it did the custom line bends with double flare: had gas specialist hook up the connections. The furnace I cut the new exhaust hole old furnace was vertical new is horizontal so some fill in above and below new inlet and exhaust. Used the saved material from the water heater cut out for filling in around exhaust. Each new unit uses different size holes and in same area. Will soon tackle the range hood
Will take out and fix the grey water tank after the outside and windows
Hope this helps