Businesses will want to know how to set up on the Internet, how to develop a Web site and how best to make money.
Home users will want to benefit from all the different areas of the Net, particularly leisure and fun pages, as well as discovering how to go online.
You could start off teaching at home, or in companies' own offices.
For a particularly up market small businesses related course, where you include lunch and an expert and/or guest speaker, you can charge a lot per day.
If you have little computing knowledge and are good at organising, you could hire teachers and just handle the school's marketing, booking and admin.
You'll still pocket the profits!