Hot Water For The Whole Family

I have been blessed with a large family – my wife and I have 5 children aged between 5 and 18 years old and all of them still live at home with us. Having so many people in one house puts an enormous strain on our Water Heater; because of course everyone needs at least one hot shower each day. In fact my teenage daughters seem to need far more than that for some reason and our washing machine seems to be continuously running. I thought about installing an extra tank system in the lower portion of the house, but have now decided that I will go for the largest domestic size of hot water system to cope with the load.