DocGP, I hear that model advertised on the radio a lot, but I'm not familiar with that brand.
A few years ago I had several acres I need cleaned. Mostly trees 25' tall or shorter. Lot of red cedar, osage orange, locust, walnut, pecan...just too much of everything. The was a field that was pasture. I was determined to hay it.
I hired a friend who had a skid steer and an attachment that looked like a hydraulic scissor. His rate was like $50, I think. We walked over the areas I wanted cleaned, about 12 acres. I told him I wanted to spend $1000, but when he got $750 spent I wanted to go over with him what was left to cut so I could decide exactly how to finish up. He said he could cut 300 red cedars an hour ( most were 20' or less in height).
He also had an attachment like a rake. He could switch from pinching to pushing in 10 minutes. He could push pile up faster then a 100HP tractor with a loader.
He could cut below the ground a couple of inches. He had a spray tank on the side of his machine. He sprayed every tree that would sprout back up with a Tordon mixture.
He ended up clearing way more then I thought he could get done, sprayed and put in piles.
The next year I hayed the ground and folks would stop by and comment on how the area had changed, and wanted to know how many section I busted on my mower. I had an old Hesston PT10, which is a sickle bar with a crimper. Replace 6 sections the first year. Two years latter I never broke any.
This just give you an idea of how clean it can get. Also, might be less trouble to have it hired out.