I regularly maintain 2, 4, and 5 acres with a CK20HST (21 gross, 15.5 PTO HP), drag tree trunks of huge pines I've cut, bush hog other people's pastures, dig stumps for myself and others, a lot of dirt work with the box blade.
I've continually been amazed at the jobs I'm able to do with such a small tractor. Fortunately, it has a lot of weight for it's size class.
John