I'm planning on joining the business shortly, part time, 2 days a week to substitute my income. I am shopping for equipment and thinking of starting with a 36in walk-behind from either xmark, jdeere, or scag. Ive seen all the models in the showrooms, and I've also been looking at used models. I would prefer a used one since its less outta pocket and it can become my backup/gated-yard mower if the business takes off, and I decide on a 48. Should I get a used mower and what do I look for in a used unit as far as wear and tear and proper maintenance?