Taylor Coach, made in Canada seems to have a history of longevity making travel trailers. If you go with older motorhomes and trailers, there are some that were well-built and still road worthy, but you need to look at them on a case-by-case and care received basis.
I feel the unit, a 2010 Hi Lo, was well-built and they were in business from 1966 - 2010 with an active forum, many rebuilding the older ones. It shows pride in workmanship and attention to detail, things missing from many. The better manufacturers bite the dust because people saw a $10,000 trailer versus a $20,000 trailer as being created equally, which they were not.
We had an entry model from Forest River, any entry level model will get 4 to 5 years of full-time use with care taken. Moderately priced units maybe 8 to 10 and some higher end up to 15 years. There are some 5th wheels that are quite solid and with an over abundance of them on the market, they can be an attractive buy.
I agree with Born Free, Chinook, and Lazy Daze being SOLID units. Fleetwood, in the last century, made some better Class Cs.