The sad truth is buying a TT is a three legged stool.
1. Cost - must not be burdensome, it is a hobby not a necessity.
2. Tow vehicle - most vehicles can pull a lot more than they can carry. That means you run out of payload or maximum cargo capacity before you run out of towing capacity. So bigger truck or smaller trailer.
3. Floor plan - if the floor plan is not correct you are stuck. There are a few mods you can make but most items cover other items.
All three of these legs have to be right. But only you can tell if they are right for you.
My plan was to replace our dinette benches with chairs and forgo the extra bed. But, one bench covered the furnace the other the water pump. I now have one bench, one chair and a small box over the pump.
My wife and I come from 20 years of canoe and tent background. There in little in our RV world that is more than a large or small annoyances. However, it can be costly at times.
Good luck