Here's a pic of ours. It's a 1 ton Chevy, cut down, pump hooked up to an 8HP Briggs. Twin post hoist. It also has a valve and male hydraulic fitting so it can be powered by the tractor hydraulics. I've added proper mud flaps, lighting, drop center wheels and good tires since this pic was taken, and next plan is to add electric over hydraulic brakes so it can be licensed. Tongue weight on ours is kinda high for a Ford 2000 I would think. My son has a 30HP Kubota, and it's borderline heavy for it.
I think that one of the posters, Fawteen(?), on here is currently making a dump trailer. Mebbe he'll check in with some tips for you.
I like Zach's gravity dump trailer. Workable and simple.