I had a 1998 Gulf Stream Seahawk that was built very well, very solid trailer overall. I bought a new 2003 Gulf Stream Streamlite was not constructed very well, traded after one trip. I bought a 2004 Cherokee that has held up well and still have the trailer.
My opinion only but I think RV's took another down turn in quality after the 2008 downturn. I don't know if it's from losing trained workers and hiring untrained people when business picked back up or trying to get by with less people. The fit and finish just does not seem very good.
The RV mfg have done a good job of keeping the cost down. I know this allows more new people to enter the RV world.
I would expect quality from a mfg that charges almost double for their TT such as Lance.