Find a good reputable dealer as close to home as possible.
Don't pay sticker price or list price on a TT, ever.
Your doing the right thing by doing a lot of research. Be as informed as possible when you decide to buy.
As others have said, all units and brands have issues. If your handy you can take care of some issues, instead of going back to the dealer.
Most dealers have a long turn around time when it comes to repairs.
If you can, go to a large RV show to view as many brands as possible.
Consider used, but check over the TT very carefully. Leaks are the major issue to watch out for.