Just because TT has a basic weight doesn't mean that is how you will be traveling. How much luggage will you have? How much water will you carry? I would use 15% tongue weight. Dealers really don't much care once you drive off the lot. On this forum you have RVers that have towed 5ver, TTs, & driven MHs & TCs. They are giving you honest opinions from experience not profits in their pockets from whatever you buy. Just remember buying a wrong RV can be expensive. I can remember several years ago a dealer refused to sell me a TT because I had a 1/2 ton truck. Things have changed but you still need to be careful of weights. JMHO.