Sounds like you are a good candidate for buying used and fixing things yourself.
That's what we did. Bought a 2004 Roadtrek 170 in 2016 and we immediately did some mods to make it more user friendly for us. New intelligent converter, new hardwired surge and electrical protector, new mattress, new Maxxair roof fan, etc.
Just this year we've had to do some fixings.
Replaced the black water tank outlet valve - which was way harder than replacing one on our trailer - more stuff had to come apart. But, we had the tools and the ability.
And just the other day had to replace the flame indicator for our fridge. Looks like we were supposed to pull the fridge out to get to the wiring connections - so we just cut the wires and soldered them to get the new one in.
Just to let you know - you don't have to build it yourself to be able to fix it yourself.