The best solution is proper research ahead of time. It took me 2 years to figure out what truck I wanted... Then I spent another 18 months researching trailers before we narrowed it down to what brand and what floorplan. Spent a lot of time researching on the internet, went to about 6 RV shows and multiple trips to the dealer before we decided what camper we wanted.
Sure, it takes longer, but we got the camper we wanted the FIRST time and love it. It is often said; if you fail to plan, you should plan to fail.