The short answer
Event security cost and staffing cannot be determined responsibly from attendance alone. The plan should consider venue size and layout, public or invited access, entrance count, event duration, age range, alcohol service, cash handling, performers or notable guests, parking, prohibited items, prior incidents, emergency exits, local requirements, and the duties assigned to security.
What to know
One officer may be adequate for a small, controlled assignment with a single entrance; a larger or higher-risk event may need separate positions for entrances, interior circulation, backstage or restricted areas, parking, cash points, and a supervisor. Officers also need breaks and relief without leaving critical posts uncovered. Armed versus unarmed status should follow a risk assessment and the venue’s rules, not an assumption that a large crowd automatically requires firearms.
Pricing is affected by the number of officers, total hours, supervisory coverage, late-night or holiday scheduling, lead time, specialized qualifications, equipment, parking or travel, and contract minimums. Give Arrow a site diagram, run of show, attendance estimate, alcohol and ticketing plan, emergency contacts, and venue requirements so the proposal can explain the staffing logic. Ask for duties, post locations, arrival and release times, communications, incident reporting, and cancellation or overtime terms in writing. No fixed guard-to-attendee ratio fits every event.