How hilly? Track loader hilly? The only thing I can do on a hill with my Kioti HST 6010 is going up and down with the grades. You sure a tractor is your best and first choice.
That extra power goes to the wheels, but when I'm working on a hill, I'm in my lowest gear anyway.
Its not that bad. But, there is some spots that I will not even try and go up on my 4 wheeler. I run my CK30 up and down them now. Its just a little slow going.