Hello! Newb question here about $20k-30k 5th wheel

Buying based solely on price will always result in lower quality.
20-30K is a low end budget if you are shopping new.
My thought is even the higher end RV's are often flawed and poorly assembled however the low budget models are even worse.
Light weight models are often made of lighter weight material which are not as robust and durable. In the end the light weight material impacts the longevity of the unit.