Whats the best riding mower for hilly terrain?
The best riding mower for hilly terrain is would be any kind of walk behind mower as you control it's movements, speed, and direction. However, if you have a large yard and want a riding mower newer LG mowers a good bet. An older option would be a Gravely Garden Tractor.
That depends on the quality of mower that you purchase. Other factors are: Maintenence of the mower. Keeping the mower garaged. Severity of use. (Is your yard very hilly or do you have to mow 5 acres every week.) It is not uncommon for a riding mower to last 20 if it is cared for and well maintained.