+1 on the used commercial... I always bring up the fact that my residential snapper lasted 15 years! However what I have learned on this site is the disparity between how I used it vs a commercial mower. I used mine 1-2 hours a week sometimes 1-2 hours a month. Your 5-7 hours a week is 15-30 times more than I used mine. So do the math and realize you need commercial.