A few years ago I cleared about 5 acres of densely wooded area, and I rented a commercial diesel powered wood
chipper. I think it was in the neighborhood of 100 hp+. I'd load the log sections using pallet forks on my tractor and feed them into the machine. A grapple would've made it easier, but I only have my little
BX2200. I rented it for about $750 for a weekend. I used the heck out of that weekend. I ran it almost 40 hours hard.
I was feeding it 12-14 inch diameter logs by about 6 feet. I'd chunk them up so it was easier on my tractor and a little easier that
chipper. It was amazing that it still had a heck of a time eating the logs up even at around 100 hp.
The best part about it, I rarely had to leave the operator station of the tractor.
When the chip pile got too high, I'd use the tractor to push some of it down.
It was actually lots of fun.
The little stuff I piled up and burned.
In any event, if it was little saplings or little stuff, then a tractor wood
chipper is OK. But not for clearing land or heavy duty use like I was doing.