The difficulty with selling workshops to schools and colleges is that their faculty are unionized and the union is solely responsible for curriculum development. This is a hard sell. The only way to reach these people is to make a presentation where you essentially teach the workshop to faculty who will be teaching it to students if they decide to buy. So, first of all, this is not a cost issue - it is a union issue. Your workshop needs to mesh with existing curriculum and provide existing faculty with extra work. At TcI College of Technology where I worked for nine years, the curriculum department took close to two years to implement any significant change to the standing curriculum. I am available for calls.