My problem with business school and the entreprenuerial courses is they teach you the theory but not the actual application.
So yes a person can do the business plan and present it, but not understand how to go out and get the licenses and registrations required to actually start the business compliantly - once they do... their biz case is different due to all the regulatory burden and it makes less sense then originally proposed.
He hoped to land a tenure track gig sometime, but in the meantime, his courses are gaining a niche audience because he's one of the few who has 'been there, done that.'