Spent this month setting up a system for a vineyard to support their concert series. Needed to provided WiFi at several locations so they could run credit cards.
Crafted a solution based on Ubiquiti gear. We used AirMax products to project the network wirelessly out to 2500 feet from the building. Then we used UniFi access points on mobile rigs lined back to the main network via the AirMax radios. Great solution, low cost, high ROI.
Plus we got to enjoy Puddle of Mud, Uncle Kracker, and .38 Special at one of the events. Bonus!