Yeah, my goal was to get a 30 footer max. KB8YMF's is a 30 ft and the only difference between his and mine is that mine has a bit more of a sweeping nose.
With my 20 ft enclosed trailer I am 57 feet long. Pretty tight at times.
Are you looking for a class A or class C?
Back to the extended tongue. Not an issue for a flatbed. Just an enclosed.