112 gallons a day is not a lot. We have exactly this and our water bill is $25/month in the SF Bay Area. Our SERVICE CHARGE just to have water is about $30/month whether we use water or not.
Lawn care is the most expensive part, that can be hundreds of dollars a month, depending on how much water you use.
When I lived in Vancouver, BC, our house had a flat water rate of $40/month. My parents would use water until the cows came home, would leave the faucet running while walking around the house, etc. When they came to visit here, I made sure they broke themselves of that habit very very quickly.
