I have done lawn and seed prep. To do correctly, takes work and well, prep.
I just bought a TC40, delivery is Saturday. With the rock hound(do you mean Harley Rake?) on the front, you would still want ballast on the 3pt; that would make for a long tractor to manuever.
I have used 56HP Bobcat S185's. It'll lift similar to the TC40, maybe a little more. You should be able to lift the implement. However, a skidsteer typically has a lot of hydraulic flow, because they are designed for hydrualic implements. You would best be served with pto pump to run this thing so you have lots of flow.
Are you renting or do you own the skidsteer?