 At that rate, Lee and Frank would have to pay about $380 a month. They couldn't afford it. For context, the average water bill for a single-family house in Scottsdale is $84. So Lee and Frank started to do everything they could to conserve. Lee showered at a gym near work. They ate a lot of packaged food, things that don't use water. We use whatever you can stick in a microwave and not add anything to it.