This is my 25+ year old deer cart that has hauled literal tons of deer out of the woods, and even an @KelvinM12 once! She is looking a little rough because I just stripped off the 10 year old pipe insulation and hockey tape that was covering it. It is just welded conduit with 20" bike wheels, and a removable handle. All the weight is balanced over the axle, so it is extremely easy to pull a lot of weight with little effort, even uphill. I have tied the handle to my bike seat post before with a rope, but plan to make a 2nd special handle just for that purpose while I have her torn down, and going to add sheet metal to the sides to keep the hooves from poking through and stopping the spokes (been planning to do that for 20 yrs). If anyone wants to make one, pm and I can get measurements.
John H.
John H.