There actually is such a thing as a rock vacuum. It’s like a shop-vac on steroids because it’s much more powerful and heavy duty. A rock vacuum is a very big and expensive machine that you’d need to rent. The rock vac doesn’t dispose of the rocks for you though. All it does is suction up the rocks and pour them out onto your wheelbarrow. The machine doesn’t suck up the rocks that fast either. To top it off, the vacuum hose is quite heavy to carry so there’s alot of labor involved in merely holding the suction hose. For all these reasons, I do not recommend renting a rock vac to remove your landscaping rocks.