Need a rider mower?
If your budget is on a shoestring, consider yard sales or even paying cash for one at the end of the summer season. Deals can be had, even like the previous post regarding a push mower.
Nobody ever needs a rider mower though. I push mowed my lawn for years before I acquired my rider mower--my parents gave me their old one, which was an even better deal for me (and them, I suppose, as it was just sitting in their garage.)