Why choose a separate handwash station?
The dual station uses foot pumps and separate washing points. For a birthday party, we recommend an outside sink so children and adults could wash before eating without waiting for the toilet. It also preserves room inside a standard cabin.

One complete package, with exact arithmetic
A package example included a $188 standard event toilet, a $105 dual handwashing station, $0 transport, and $8 taxes and processing. $188 + $105 + $0 + $8 = $301. The sink price was a package-specific discount; it is not a standalone advertised rate.
Construction handwashing in California
Title 8 §1527 requires 1 washing station for each 20 employees or part of 20. For 21 employees, round 21 ÷ 20 up to 2 stations. Water, soap or suitable cleanser, and single-use towels or a warm-air blower must be available. For nonwater-carriage toilets, stations are generally outside and unattached, subject to the fewer-than-5-employees exception.
Capacity and supplies to confirm
Ask for the actual model sheet. Confirm fresh-water gallons, wastewater capacity, station footprint, and refill frequency on the actual model sheet. A twin basin does not remove the need to check how the applicable rules count the station.
For a hot Yorba Linda afternoon or a food-focused gathering, keep the station easy to find and arrange replenishment before water or paper runs out. If you need food-vendor handwashing, have the organizer verify the specific health-permit requirements; a guest handwash station is not automatically an approved food-service setup.