Need a Lawn Mower

My Name is Chris and I have Cerebral Palsy.......I love to exercise and one of the things in the summer I do to exercise is I mow  Grass......Sadly my lawn mower is on its last leg and I need to replace it with something a little bit better......The Mower I am looking to purchase after taxes is roughly $ 2,500.00.....I want to purchase either a 36 Inch Ex Mark Walk behind or a Zero Turn Mower......I love to cut grass for exercise and it gives me a purpose sadly my lawn Mower is on its last leg and I need to get something a little bit better...........