I've been in the lawn care biz for almost 10 years now. My suggestion is to find a good used, commercial grade Zero Turn. If you can find one with around 200-400 hours on it in your price range, get it. They are rated to last around 1500-2000 hours. If you're using it solely for home use, you'll never have to buy another mower. I run Wright mowers, but have had Exmarks in the past. Both great mowers, that have given me well over 1000 hours of use with only minor issues from time to time.