The course is 3-4 hours per week minimum. And many EMF graduates have found that one of the benefits of the course is that it has helped them understand there is no necessity to work long hours (truly!). So set aside as much time as you can possibly dedicate, as like anything, the more time you can put in, the more you will get out of it.
One extremely powerful point about EMF is that the course has been designed to ensure the fastest results in the shortest achievable time. People want results, and as long as work is done, the results are delivered.