Ted
Have a look at a franchise, I started as a kwik kopy then they pulled out of SA. So I got the systems and training which helped a lot. Then speak to others in the same industry and listen. An example I was told not to print wedding invites etc. I didn't listen but have learnt. So it is only done for good customers and only with supplied artwork. You must see how people change their minds. Or take the contrary view and specialise in what others won't do.
I have always wondered if an internet cafe is viable, you charge R60 per hour only have a 25% of available time sold, plus you waste so much time teaching people how to surf. I don't have the patience.
Good luck