I suppose the effort to keep the weight down means flimsy construction. I think any RV, at least any under $200k, is going to require lots of maintenance. At least that's been my experience with a 1971 10.5' slide-in Sandpiper pickup camper, a 1972 25' long Holiday Vacationer travel trailer, a 1973 18' Winnebago Brave motorhome, a 1975 18' Horizon by NuWay travel trailer, a 1988 32' Carri-Lite 5th wheel, and a 1992 40' Bounder motorhome. In addition to vacations, we were full time RVers for 6 years, both my brothers are still full timers, one used to be an RV salesman, an RV service technician, and an RV dealership F&I manager. The other is still self-employed as an RV service technician.
Yes, there are many things you can look at as to the quality of the RV. Things like type of framing, roof material used, exterior siding, wiring, type of insulation, does it have shock absorbers or not, axle/tire/wheel weight capacity, size of brakes, thickness and quality of seat cushions, type and size of bed/mattress, quality of fabrics, quality of cabinetry, and too many things for me to continue listing.
But in the final analysis,
in my opinion, the most important thing . . . . is it a floorplan that both you and your wife like?