I have never used a 3pt tiller before but am picking up a 72" tiller on monday. I have a field that has been disced every year and needs to be worked up again. I do not own a disc anymore as I sold it with old tractor(it was too big) and am thinking of using the tiller. The field is 10 acres and we have no rocks. Heck you can dig 20 feet here and not hit a rock. I know there are a lot of variables but how fast can I expect to till assuming I don't need perfect results just those similar to running a disc over it. 1 acre an hour? 2 acres an hour? 2 hours an acre? I have no idea and am just trying to decide if I should tackle it as my first tilling job or if I should buy a small disc.