Tankless Water heater

One item about the tank heater in a coach is the temperature of the water is much higher than you have at home. Usually around 140. Being that high you will us less hot to mix with the cold to achieve the desired temperature. So a six gallon supply of hot will go a long way. With two adults in our coach only once time has the water temp dropped from use and that was after two longer than normal back to back showers.

Also watch the temp around children it's hot enough to burn.