It sounds like you may be over-complicating it. N2 offers a race licensing school as part of a normal track day, though you do have to sign up for it. It will include classroom instruction and a mock race start. It is completed in one day and you are free to ride as you normally would for most of the day, except for the required classroom sessions and the mock race start. I am not familiar with Bargy's school, so I can't opine on what they offer.
If your concern is getting your race license only, then N2's program is what you want. If you are looking for rider training above and beyond what you get from N2 CRs, then you will have to go to a race school.
If you have never launched a racebike from a standing start with a bunch of people around you, then you are in for a treat. It is pretty exciting.