I have 2 acres of sloped yard, not super steep, but definitely hillside. Not too many trees but some. I started researching commercial zero turn mower's and wanted to know what you guys that have them run and why? What size deck do you find ideal? How many hours do things last? Such as, engines, hydros, decks etc. If I look at used, what parts should I be inspecting closely? What do I want to stay away from? If you are just going to mention what you have and that it's the greatest, please tell me why you think so.