Hello Diana and Adam,
Well, you need a location, utilities connections and permits, a wholesale supplier for coffee and other ingredients and items that you plan to sell, an espresso press or other coffee making equipment, refrigeration, an area to serve patrons, and a way to take payments and track sales.
Depending on your location, this can be done inexpensively on a small scale or it may cost quite a bit in rent and permits alone. That’s the rundown of what you need to put in your business plan and figure out what it will cost to launch. Good luck!