Like most other things, I like the old stuff, I have 3. A 13 ft 60 something Serro Scotty "caned ham" trailer, now lives in the yard as a changing place for the hot tub. A '78 Shasta class C which for 30 some years pulled at 30 ft race trailer all over the country 370.000 miles. Rebuilt the engine 3 times, trans 1, and now doing the rear end all done here in the drive myself. Have updated the elec converter, refer, furnace, water pumps to newer style, again all here. Point being on things like that, you can do everything yourself, things are easy to get at and simple to replace. No 3 is special, 1964 Bluebird Wanderlodge. the very first year they built a coach. Only year powered by a Chevy 409. Runs good, interior is almost perfect. Bad part, really sun faded, and I have no place to paint something 32x 8, x 12 high. Now the bad part. 3 years ago my kid bought a used, 36 ft rear engine, turbo diesel Airstream, fiberglass body not alum. It is beautiful inside and very fancy, and thats the problem, its had a fair amount of elec issue's, there must be 10 miles of wiring in that thing, 3 separate fuse boxes in different areas, and everything is behind fancy walls with cabinets and furniture attached, its at best hard, sometimes impossible to work on much of it and you need an electrical engineer.
My advice to anyone still shopping, look for how easy it will be to fix problems as they show up over the years, look for the industry standard size furnace, water heater and so on. The really fancy stuff looks great until you have to fix it