that toro timemaster 30" is designed for a home owner, to be used once a week, to have the oil changed once a year, and a new air filter every couple of months if needed. these are not designed for the commercial user, either save your money and put it towards buying a used commercial mower like a 36", but if thats too big for you or you insist on buying a new machine buy one of the honda 21" commercial mowers like previously said.
Here's a couple from last night. Grass was wet from snow and hasn't really thickened up yet. I just put the striper on it. With a 2.5 inch front and 3 inches, I bagged about an hour's worth of mowing with less than a coffee can of clippings under the deck. So far, I'm happy.