Easy, free gravel. Become a gravel salesman.
Would be interesting to see how it appears though. Can I get to just point to a spot and suddenly gravel? If so, charge people for the show too. Just rock up to their house, point at the driveway and boom, gravel. Easy money.
Added bonus: don’t like someone? Boom, house literally full of gravel.
Gravel.
Better not have gotten that gravel for free else no teleport.