Elon Musk, CEO of Tesla, is a peculiar billionaire. He seems to have an aversion to markets. Given the choice between buying something and making it, he chooses the latter. While other car-makers outsource, he insources.
Tesla was designed with an enormous footprint. It built, and owns, the factory where its batteries are made. It runs its own dealer network. Because its cars are pioneering and unique it must run its own Tesla-branded fueling stations and service centres.