This morning, I picked up a Bri-Mar 508 hydraulic dump trailer. It was $2,395 plus taxes & tags, so on the road for a total of just under $2,600. It is single axle, 5x8 bed, rated at 5000 lb. gross, with electric brakes. There is a similar model rated at 3000 lb., which is less expensive, but I wanted the brakes and additional capacity. The trailer is fairly stoutly built, but not overbuilt, and looks well designed. I tested it by hauling and dumping heaped loads of compost, with between a yard and a half and two yards per load. The electric hydraulic pump handled dumping easily. The compost was fairly dense, with some topsoil, so I probably was getting a ton and a half or so per load. It handled it easily.
For short hauls, I am pushing the trailer backward with my Power Trac 1845. It is easy, and positioning is precise. (Backing the Power Trac, thus pulling the trailer forward, takes some practice with the articulated PT.) Since I drive forward to hitch up, and the ball swings sideways when I turn the wheel, hitching is astonishingly simple. It is easier, I think,than with the rear-steer loaders most commonly used for pushing airplanes. And, since the ball is on the loader plate, I can lift the tongue and shake the trailer with the PT hydraulics to supplement the dump.
So far, I like the Bri-Mar but one day is hardly a career. It was a couple of hundred dollars cheaper than quotes for an EZ Dumper, and seems very similar.
So, I moved a compost pile a couple of hundred yards away from the barn, and stuck the trailer behind the barn where it will be filled with horse manure and sawdust daily. Seems a nasty thing to do to a pretty new piece of equipment.