Hiring a food truck for a corporate event costs roughly €800 to €1,500+ per truck. On top of that come the food costs: roughly €5 to €15+ per person, depending on the menu. For 100 guests you reach roughly €1,500 to €2,500+ in total.
Premium food trucks with a chef-staffed kitchen are higher. For larger groups count on 1 truck per 75 to 100 guests to avoid queues.