Building an underground water tank is another way we can save on water expenses. Water is one of the most expensive items on our list and as you can imagine, the home houses about 30 people and a lot of water is used per day but with an underground tank we can collect rain water which will help us to save on the water bill. This is also a need we’re sharing with you as they say a problem shared is a problem halved. Please help and share these needs with people who may be in position to help us out.