I own a forwarding trailer, but it's on the heavy side for use behind an ATV or SXS: it's probably close to 1500# empty, and can carry a 6000# payload. Mine is too small to be of interest for a commercial logger, and too expensive for a typical landowner to consider just for personal use (I got it used with only about 50 hours on it for a good price). Mine has the optional hydraulic winch. It's much slower than the 3 Pt Hitch logging winch on my tractor, but it is handy reaching logs that are not right on the trail. Given the limited reach of the boom, I would not own one of these trailers without a winch.
There seems to be a big gap between the lighter models intended for use behind a 4-wheeler: about $3000, rated for 1 ton with the boom manually operated (swing by hand, hoist with a hand cranked winch or a small electric winch) and those designed for use behind a tractor ($20,000 & up). There are a few on eBay in the middle ground, around $8000 with a 3000# rating. Pictures show them in use behind an ATV/UTV, but I imaging the load would exceed the tow rating of the ATV. Some have an optional hydraulic drive on the trailer wheels: helpful to get moving again when stuck, and also act as a brake when going down hill (movement is rather slow then the hydraulic drive is engaged).
Here is mine hauling some firewood home after doing wildlife mast tree release and trail cleanup:
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and another picture where I was helping my daughter with her Girl Scout Gold Project, creating an outdoor classroom area in the woods behind our local elementary school.
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