Clearly, it does not make sense to rent garden tools that you are going to use on a regular basis. Nor is it worth renting tools that are relatively small and inexpensive. The garden tool rental business is focused on power tools rather than hand tools.
Renting has the advantage that when you are not using the tools you don't have to store them. It also removes the hassle and expense associated with repairing tools - sourcing and paying for spare parts or paying a mechanic for repair and mainenance. Also, rental companies will stock the latest technology.
Riding lawn mower