Max tow pkg is a good start. Combined with the MAX payload (7500 # GVWR) and fac. tow mirrors you have the golden unicorn of F 150s. I have never seen such a beast as a stock unit on a dealers lot. Only special ordered. Altho lots of Max Tow stock units are stocked. One would think a Max Tow equipped PU would have Fac. tow mirrors as well but they don't order them that way.?
FWIW, If you KNOW you are going to stay under 5k for a TT, don't over look the Ridgeline.
It dose not sound like you have the TT picked out yet. If not, the best piece of advice is to find the TT you want and then the TV so you can match the TV to what the TT weighs.