I clean two bathrooms and the kitchen with one tank of water. You can fill it with hot water and it heats up much faster. And when all the water has been used up, you can refill the tank straight away. It simply mustn't be pressurised any more, but it's quickly gone when you press the steam button. The only downside for me is that you have to press the steam button all the time while cleaning.

What exactly is the question? 😉