Builder,
This trailer is a Texas Bragg with a 30' deck and 5' dovetail rated at 20,000 lbs. The upper deck is either 4' or 6'. I went with 35' overall length, becuase at 40' I would have had to register it commerical. An exhaust brake would be helpful. The deck on the neck does add a lot of weight and drag, but the storage space comes in handy for bales of hay, extra buckets/implements, or footing when straping down loads. When I hauled the 1566, I was able to dismount the outer duals and stack them up there. Otherwise, there was no way they were going to let me go over Bay Bridge across the Chesapeake Bay. I had a kingpin installed rather than a gooseneck hitch so that I could switch between pulling this trailer with my pickup truck or a semi. That was indeed a smart move and something you may want to consider. For some, this is a whole lot of trailer. But, I have had 12 bales of hay plus my tractor loaded on this trailer. My tractor and a baler with room to spare. And even, my tractor and my dump trailer loaded. As I look at the pictures, I see that I probably could have moved the load a little further to the rear to get more weight on the trailer. For a farm tractor and bushhog or backhoe, IMHO, this set up here would serve you well. If you went with a 5th wheel kingpin rather than a gooseneck hitch, a single (or tandem) axle daycab semi would let you max out the trailer. But, for general farm work and hustling light equipment back and forth, this set-up is a little more versatile.
Hawk