I used to get into our local RV Sales and service outfit down in Vacaville Ca back in the '70's-'90's - and regularly saw various brands and types of RV's with their skin removed...
Most owners would be totally appalled at the "quality" of the framing in under all that shiny sheetmetal - all 1/4, 1/3, and similar pure JUNK lumber - full of cracks, knotholes - and often so short in needed length that nearly an inch of space was between the ends and the part it was supposed to attach to - no screws, glue, or reasonable fasteners - just staples that often failed to properly bridge the gap!
The abysmal material quality of most competing RV brands was what sold us on the '88 KIT 5er we have - pretty much ALL quality materials and fasteners - as displayed in the various areas that can be seen in, under, and around inside cabinets, closets and outside compartments.
John Day....|'88 Winnebago Super Chief 27ft. Class A
Eastern .....|'88 KIT model 240 24 ft. 5er
Oregon ......|'02 Dodge/Cummins 2500 Quad Cab