[SSSammy]

db, recently ordered a 20' Pace Shadow GT .. fairly fancy, you don't really need an interior if all you do is haul. But do consider the length of the entire rig. You can pull even a 28' with your SuperDuty, but think about handling the thing in gas stations, hotel lots, and restaurants. I have seen a lot of 20's at events, pretty popular size. You can strap down a tool chest and even a set of track wheels/tires in front.

Get brakes on both axles. Surplus axle capacity costs extra, but makes for better resale. Depends on your price sensitivity. Do plan for GCTW plus 1000# so you can pack some heavy tools for the track.

I notice a lot of internet dealers in the southeast US .. check racingjunk.com and ebay for deals. Good luck!

Sam