Cheapest I’ve found in the us is the Dunkin medium roast, but as others have said grinding it with a burr grinder (not a blade grinder) is a huge difference. You can buy a bag of beans and have them ground at some supermarkets though. True bulk for a community break room is gonna be hard. Best of luck.

Unifi is good hardware for security, but it’s ok hardware for privacy. They require cloud connectivity for setup, and it incessantly checks in with their cloud, even though cloud account is disabled. Pfsense is an amazing solution but I chose unifi for convenience and availability of hardware (particularly WiFi access points).