I'm in a stump to where i have the opportunity to cater at an gallery with no water supply. Running the espresso machine is not a problem, because it will have its own water tank. My concern is about being able to rinse frothing pitchers after steaming milk. What is the best way to run operations if no sink is nearby? There is a kitchen, but it would be a hassle to go back and forth after each beverage. Any suggestions? I only plan on serving espresso beverages at these events (no blending or brewing)