I understand about wanting a high quality machine, but are you sure you need to spend that much for once a week use? Those commercial units are built for 7-day a week use for 6-8 months a year. Personally, I would look at the Snapper units, which range in price between $2,700 and $4,000. They have 38" to 48" decks, with 14.5 to 18 HP models. I do not own one, but I have a Snapper SP walk-behind that is 18 years old. I can vouch for their quality; it runs and operates like a new one and I have only done routine maintenance. Sure, you have to go to either a Kohler or B&S engine, but for the money, I would sure consider it.