A drone, a license, and a laptop is the whole kit. The listing photos are a race to the bottom, but the roofs and the insurance claims are where the recurring money hides.

Every restaurant pays somebody to haul away its used fryer oil. Run right, you are the one getting paid, twice: once by the kitchen, and again by the refinery that turns it into fuel.

A leash and a phone is the whole startup cost, which is exactly why everyone assumes dog walking has no ceiling. One operator sold hers for seven figures. The difference was never the walking. It was the routing.