Can't give you any advise on 5th or TTs but we bought our first and last Class A about 10 years ago and after a 6 week trip, we found there was just stuff we didn't like and bought our second and last Class C You guessed it, we are now looking for our 3rd and last Class B.
Don't buy new, look for gently owned. Talk to your friends with the TT and others who own and ask what they like and don't like. The size of your family, the kind of camping that you want to do,( boondocking vs resorts) are you going to winter camp or camp in the desert in the summer.
Welcome to our world