In your opinion, is a belt driven 36 commercial mower (e.g. Exmark Metro 36, Gravely pro-walk series, Toro TurboForce series, etc.) too much mower for cutting one residential 0.4-0.5 acre lot (once a week or so)? I'm really torn. There aren't many residential mowers larger than 21 that appear to be worth considering - I don't want a piece of junk, but I'm also hesitant to spend ~3-4K for a mower I won't use that often. I've looked at the Gavely WAW 34, but I'm still not convinced it's worth $1500. Thoughts?