Messicks did
this video on the 5 most hated implements, the
#1 worst was the MMM. Personally I would rate the rear mount snow blower #1, but the point is
I would get a zero turn and forget about mowing with a tractor. Even if you get turf tires, you'll still tear up the lawn if it's wet or even damp out, every time you want to take the mower off you'll be hissing and spitting, and if you have a lot of trees it's going to take you forever, and when you're done it won't look as good as a ZTR would. For what you've described, get as much horsepower and lift capacity as you can afford. For example at some point you might get pallet forks, but with a
B2630 you will have very limited lift capacity by the time you put the load out on the forks. If you want to pull a bush hog on hills through heavy brush, you either won't have the ground traction or the power to run a bush hog. If you want to till or turn over dirt in a garden, you'll need more weight and power for a ground engaging implement. If I were in your shoes I'd look for a used low hour L at least in the high 30 HP range or more, and wouldn't rule out an MX with 50ish HP. Kubota warranty is transferrable so if you buy something fairly new you'd have some warranty left.
"I wish I had bought a smaller tractor" is something no man has ever said, anywhere, anytime.