[wayner]

One specialty shop I know of has the owner with his own bay. His techs have the others. Supervision is not something they require. His value is in running interference as well as taking care of administration (including parts ordering etc) so they can be productive

He closes his door to the public three days a week.
The other days are by appointment only, and he schedules those appointments carefully so that he doesn't have many people interrupting the shop if at all on those days.

He spends a lot of his time on social media marketing his shop by publicizing projects and adventures the shop has been involved in. he takes in high end work, project work and turns away anything that doesn't fit his exact mold. I have no idea how long it took him to build not so much a customer base but a following and brand awareness