The cost to bring in a caterer varies based on the location of the event, number of guests, the food style and requirements As a general guide the cost to hire a food trucks for mains starts at $1,000 - $1500 during the low season. For high-season catering, the expected minimum spend is $2,000.
Consider $25-$30pp on average for budgeting purposes. Yep, that is considerably cheaper than a traditional caterer.