yearly revenue

OK firts you have to estimate your costs, the place, the machines, etc. and how many people will visit your place, for example: staticals about the people how drink coffee like potencial clients, etc. (rank age of the city) or you can visit a coffee shop and look the prices and observe how many people visit the place and how much they spend in a visit, try for a week at least. Quote the prices in internet and you can call to ask the prices to.

Good Luck! :)