I have a 1999 year model new Holland 3010s , 2 wheel drive, 50 HP Wish I had gotten the 4WD. It weighs 5000lb without the loader. Be careful in the hills, same principle applies to the bigger tractors.
Just wondering, what are you trying to accomplish with the land? How big an area, acres? Doubt if I’d use a tiller to break it up, disc or chisel point, then a harrow behind the disc to help smooth it out.
I would hire someone with a Dozer to do the pond work, I'd hate to tear up my new tractor doing things that it was not designed to do. What size hp tractor are you thinking about?