I used to have a 3180 that I used a 108hp naturally aspirated tractor with so I have a couple of thoughts on this.
Bogging down was never a problem of course but I still had to slow down to get a nice cut on heavy grass/clover. You may have to cut high and make a second lower pass. With 15' though, you can cover a lot of ground.
You would not want to take on a thick hedgerow. Woods says that these mowers will cut 3" thick brush. Yes, they will but at a creeper speed and it gets pretty radical back there.
If I remember, the 3180 weighs around 4200 lbs, not sure about the BW180. The weight is something to respect.
When I bought the Case, the dealer in another state had gone over the PTO. To engage it, you pulled a knob mounted on a cable similar to say something on a dump truck. It was stiff to pull in and hard to "feather". The first time I used it on the batwing, I ripped the reverseable PTO shaft in half on the Case.
I did get used to it but once when I was tired, I pulled it in to quick and broke the main mower shaft in half right behind the front u-joint.
While having some other issues repaired, I had the PTO rebuilt by my local dealer. They said that it was not fixed correctly the by the first dealer. Off topic but it worked smooth after that.
My point is though, there is a lot of mass to get moving as others have said and you can tear things up.
I sold that tractor and mower to a neighbor when I moved. I told him to service the slip clutches before he used it come spring. He did not and tore up one of the wing driveshafts.
Overall, the paint held up well on my Woods except for the hinge area. Not much you can do there except wash it and spray some WD or something on it. Still going to rust.
Speaking about cleaning. I don't know if say a Rhino or Bush Hog is easy to clean but the 3180 takes some time to blast off with a pressure washer and you are going to be slimed until the job is done.
Lastly, my 3180 only had one hydraulic line when I bought it. One wing seemed to never want to go down even when the mower was level. I soon added return lines which is easier on some tractor hydraulics anyway.
Still, the wings were very touchy to drop. One would go down while the other would hang while loosing hydraulic pressure then come crashing down if I let it. When I had to go through a gate, I would only raise the wings enough to clear the opening.
I never got around to looking into some kind of valving to get around that issue.