Living on a shoestring budget and need to mow the lawn?
Buy a push mower.
Look for a good used one at a yard sale, if you can't afford to buy a new one at a store.
A good way to acquire a new one is to buy one at the end of the summer season. Stores will typicaly discount these items way down just so that they don't have to hang on to the inventory until next year.
Also, offer to pay cash for a discount. You'd be surprised at what kind of deal you can get.