Well, I must say I am not familiar with these as a stand alone unit. Mine are integrated in to a box blade. I would think that this unit would be on the light side to do any real work, however, it has a nice design feature to add extra weight to it. You are correct that ground tilling is tough work, but unless you really do something out of the ordinary you should be fine. Give your friends unit a try. Sure would like to here about your application and how it worked.