I have a 24,000 lb. rated gooseneck that I pull with an F350 and
manual tranny. It is a wonderful piece of equipment. It goes WAY
beyond the ability of a tag trailer.

We last hauled a 18,000 lb. mill from central IL to central MN.

Brakes are the biggest issue. I was able to install a brake controller
that taps into the brake line. Unfortunately these are no longer made.
The units with a pedulum inside (nearly all of them now) are not worth
a **** for this application.