So, my wife and I just bought 77 acres. A good portion of it is covered with thorn bushes and that's main problem. Probably 20 - 40 is pretty thick and needs to be cleaned with a machine. I'm actually going buy the Forax GP40 because long term we have lots of cleaning to do and at $2750 per day, per machine, it would cost a fortune to clean or possible more since the area is extremely remote.
For several months I did run a Kubota 97-2 with and FAE head. Yes, it is extremely violent mulching, especially with a huge machine like that. The 40" Forax seems a good bit tamer, but not without risk. At least I know the dark side of mulching and will be more aware of the dangers. I was asked to consider a PTO driver mulcher, but honestly, with no protection, that's way to close for me. Plus, I can't be turning my head all the time to do the cleaning looking behind me.