We have a dump trailer that’s 6’ x 14’, 7 ton trailer with lift and high sides. Its a great trailer and my husband uses it for work (he’s a carpenter so when he does demos in houses, he uses it to remove walls etc). We also use it for loose shaving and it works great! I know he wants a wider trailer so he can fit the tractor on it, maybe one day.
He also keeps a trickle charger hooked up to the battery as its not used that often. He has a cover for it as well and uses it when he moves anything around that goes out on the road. Works great!
He was lucky and found it used (only a year old at the time) from a roofing company.
The hydraulic lift will not freeze in the winter, and we get -40C and no issues with the lift (have owned another slightly smaller dump trailer before this one for many years as also no issues with it). My husband has put some sheets of thick plastic down on the bottom of the trailer so the shavings will slide out when the lift is up, and this has helped a lot.
I would assume manure/urine would eat away evenually if its a steel body. You could get it in galvanized, but it would cost $$$ and would have to be custom built I’m sure.
Dump trailers are so handy on the farm and I’m sure you will find lots of uses for it! We do use ours to move our manure pile to the back of our property. We have also used it to move boulders, get dirt for gardens, gravel for driveways, sod for the lawn etc, etc. Very handy piece of equipment!
Here is the company that we purchased ours from:
https://jensentrailers.com/shop/trailers/dump-trailers/premium-series-canada-trailers-manufacturing/7-ton-premium-series#tab-specs
I know its in Ontario, but your $ goes much further up here 