Do you not have a PTO or tractor, that you want ground drive?
We had a Millcreek ground drive for a while, back when they first got into business. It worked very well, though it needs emptying daily in cold weather to prevent the load freezing SOLID. Chunking out the frozen stuff is a miserable job!! Tires will not drive the chain to dump a frozen load! Just will break the chain somewhere.
My only complaint was needing to drive and drive, to get it fully emptied. No pieces left in the box to freeze down. At times the ground was too wet, slippery, to be covering the distance needed to get fully empty.
That spreader was wrecked when a speeding truck hit it when son was driving across the road going to the hayfield. Nothing salvagable except the axle and tires, twisted lIke a discarded candy wrapper!. Spreader hitch broke loose from tractor, was flung across the road into our ditch. Son stayed on tractor, which got shoved, did a 180 degree turn as it went into ditch on other side ditch. Thank God tractor (8N) stayed upright and son was strong enough to hold on.
Our next spreader was PTO powered, which allows fast or slow spreading, dumping entire load in one place if needed or running the chain only, to get everything cleaned off the floor to help prevent freezing chains down. I do turn chain on for a few seconds to make sure things are working right on very cold days, before loading the spreader. Better to break things unloaded, than needing to shovel out the load, THEN fix the chain!! Bars and chains wear on any spreader, get rusty, need repair as time passes.
I would always buy a PTO powered spreader after owning the ground driven one. Just more versitile for me, in dumping options when my ground is bad.