Teamcasa:The level of training is not determined by the location of the instructors business. There are good instructors both teaching out of established shops and their basements, there is no correlation.
It's far from absolute. There are excellent instructors teaching at shops, some of them are on this board. If anyone thought I meant to say that was not the case, I apologize. There are also independent instructors who are incompetent. All I'm saying is most of the pressure to cut corners in classes comes from shop owners. All shop owners don't do it, but a whole bunch of them do.