Price units, not events
A rate card that quotes a price per event only works if events are similar, and at a venue they never are. A trade display, a function and a large public event differ in duration, footprint, waste and staffing by an order of magnitude. Pricing whole events forces either a wide range that means nothing or a renegotiation every time, which is exactly what the card was meant to avoid.
Units solve this. A cleaner hour on a weekday evening, a cleaner hour on a weekend or public holiday, a supervisor hour, a defined area reset, and supply items such as additional bins or consumables. Every event is then described as a combination of those units, and the total follows arithmetic rather than negotiation. The card stays valid across event types because the units do not change.
