My advise would be to speak to an accountant who will advise you on the planning and running of the Business.

From what I've experienced watching others start up small business, you need to plan ahead, budget and work long hours before you reap any benefits.

when we were inquiring about thsi sort of thing that is the first thing we did.
also you would take a myob course unless you can afford to pay an book keeper every week to come do the masses of paper work,
you would struglle to make ends meet at opening one or two days a week,
to give you an idea of over heads to run a cafe, ours costs about $400 grand a year to run and we are a small one.
you would have to talk to your council about town planing scheme to see if you can settup the style shop you talk about, it would be best to buy an already established cafe like we did, starting new with commercial equipment is very very expensive to get shop fitted out. but that isnt the best benefit of buying a cafe already there, the best part is it has already been settup with council for food, and so you already bypass allot of redtape. a business in town here where i live, wanted to setup a sandwich shop that sells other things, they paid $120grand to buy the existing takeaway shop just to close it down and too use the shop and lease, they didnt buy the building they bought the buisness so they could rent it, they could have rented the empty shop next to it, but it wasnt setup for food and would have been allot of red tape, so they paid big money just to close a shop down and reopen it as another shop. so your best bet is look for a business selling up and in the climate it is atm it shouldn't be too hard to find one.
you could not just start a dodgy shop and try and avoid the above, you will be shut down and serious fines.
we have $80million dollars worth of public liability which is what council has dictated us to have, we must have that sort of liability or council will not let us operate. they made us double that from the precious year which was $40mill.  its allot of work to settup, but i dont want to talk you out of doing it because i love the idea of a person going out and doing this, im just giving you a bit of info. so first step i would take is, take a business course, learn myob, do a food safety course which isnt that hard, find a place or business you are interested in, tlak to accountant, talk to the bank, talk to real-estate who is selling the business, then talk to lawyers, then talk to council, then you work out where you are at. i was a bit lucky as i have always worked for small business, had good idea what to do, and also i had family who were real-estate people so i knew what i had to do with buying a business. our cafe has the same food safety standards you would use if a full blown restaurant, but i help settup our junoirs to learn this stuff, they are on hospitality trainee ships, and business and retail trainee ships. i was put on these sort of things by my employers when a junior and helped me out to know all this sort of stuff,