Your choice of trailer is awesome! It's a combination of my first two trailers. The floor plan is almost identical to my first TT, a Dutchmen Sport (lite) -- 18 foot. I towed it with a 1500 Chevy Suburban, V-8, and it destroyed the transmission within 3 months and it was suppose to have a good tow rating. Expedition reminds me of my Suburban. Knowing what I know now, I'd never tow anything bigger than a pop-up or utility trailer with it.
My second trailer was a 31 foot Springdale travel trailer.
Your call, but I'd never tow with it.