I don't live in SF or need that sort of instruction, but that strikes me as a bargain rate - even for group instruction.
I suggest you think of things this way - can you find 3-5 (there are three below, so good marketing) people who would want to take a tutored course of say two weeks. Then you need to find a community college or similar where you can rent a room and Ethernet. The small group learning is always a better bet.
This is a pretty good idea though.