To the OP. You have experience in IT and saying you are about to get a degree of some sort in IT, so you are obviously reasonably proficient.
Have you thought about other avenues within IT (But still being your own boss) ? Maybe consulting or something?
Personally I think the netcafe idea is far too much hard work and stress for little return, considering your skillset. I'm not saying it won't work and all the power to you if you do get one off the ground..it just seems a lot for a little.
Have you perhaps thought about asking around all your friends and families to see if their company needs an IT Support consultant?
I use to work for a 2 man band IT support company. They had a reasonable amount of small business as clients... something like 10-20. But he was easily earning enough money to be happy, and was working with computers all day.
If you can manage to increase your skill set to become proficient in a certain sector such as security or VM's, you can make silly money by consulting.
You obviously know your way around computers - don't restrict yourself.