We have purchased older used spreaders, made for farming, not horses. Both are moderately sized, not huge, but not tiny. They get emptied daily, even if not full. That keeps the chains and floor from rotting or rusting away. Have to say putting in a new floor or having the chain or bars break when half unloaded is NO FUN at all. Better to keep the chains and floor dry with daily unloading.
We had a John Deere 40, which did a good job for us for years. We wore out chains, bars, put in new floors over the probably 20 years of owning it, and we got it well used. Eventually the big gear for the chain was too worn to fix, other cast parts were equally worn. The big gear alone cost $900, so we decided to get another spreader. Then I SOLD the JD spreader, still got a few hundred for the parts to be used on another spreader just like it!
Present spreader is a Massey Ferguson 160, which had been just buried under stuff in a barn the last 25 years. Husband found it parked beside the road with a For Sale sign on it. Paint was a bit rusty, but everything worked, tires were OK, so we bought it. Husband put a couple coats of paint on it, greased everything, and it has been a nice machine for us. Same physical size as the JD spreader, is real farm equipment tough. This new one does come with a chain gear setting, which allows you to spread fast with LOTS of manure flying even at slow speeds or lower setting will just dribble the load out on the long side of the field for light application.
Both spreaders are PTO, I wouldn’t have a ground drive spreader now. They can take ACREAGE to get emptied if you pile it in there. I used a ground drive Millcreek back when they first came out, liked the spreader, but it took forever to dump the load for 5 horses. Son got hit by a truck with the spreader behind, which wrecked the spreader, messed up the tractor transmission. BUT Son was fine thank the good Lord!! Tractor stayed upright, he held on and didn’t get thrown. Spreader got broken off the tractor hitch, was tossed into the ditch, twisted like a pretzel, so we wrecked it out, made the parts into other things. That was when we found the JD spreader.
I can’t recommend any spreader that you plan to leave manure sitting in, to last as well as one emptied daily. That load with urine will also rot metal or wood sidewalls in many cases, so you cause other problems. We let a load sit in the ground drive spreader WAY back, it froze solid, couldn’t empty the load with ground drive. Had to chop that load out. But even PTO will have problems, break, if you let the big load freeze hard in the spreader.
Just saying that at times, getting an old spreader in fair shape, might be a bit of a savings, be a tougher machine, than the “Hobby Farm” models sold in magazines. Get good sized chain links, decent sized spreader bars to push the load out, not cute little tiny stuff. Bedding and manure make a fairly heavy load to move, needs suitable sized parts to do that with. Big beaters to spread that load, not just little bars or tiny paddles that actually do nothing in helping break up the load. My MF spreader can totally dump itself in a cloud of flying sawdust in a very short distance when I have that gear ratio up higher than notch 3 setting. I was quite amazed at how wide and nice of a layer it put down while experimenting with settings. I prefer a slightly thinner layer so I stay down on that notch 3 about 99% of the time.