Nino - were you looking at just a small shop? what would the setup costs / rent have cost you (if you got that far)? Would be a great idea.
I'm not sure of the costs these days. The building I was going to use is owned by my Father - so no rent. Back in the "old days" pins were sited and the money box was emptied 50/50 with the shop owner. The shop owner covered the electricity etc, and the operator covered maintenance etc.
I think - and I could be wrong here, there are other things to consider - like public liability insurance.
I will look into it within the next 12 months.