I'm looking for advise on buying an older used tractor in the 30hp range...specifically the pros and cons of a crawler compared to a standard one. I've heard how much trouble a track systems can be. Any comments on maintanence or repair costs for the drive systems or transmission problems in general. I live in a hilly/mountainous area where I figured the lower stability of a crawler would be safer. Also, I plan to equip it with a dozer/plow (for snow and driveway building) and a backhoe. It'll mainly be used for the developement of a homesite and other maintanence afterward. I'm currently looking at a John Deere 1010 crawler w/blade, but has worn rails and pads. How is the availability of parts? Thanks much.