That depends greatly on what they are being feed and served. It can be anywhere from a low $5 a person for pizza and soda, to several $100's a plate for fine gourmet food served with wine. And there...
1. Check your city/state regulations about health codes, licenses, certifications, etc. - http://www.business.gov/ 2. Decide on a budget: how much you want to spend on supplies, if you are going to...