Easy if you DONTt use lots of water get a meter if you do stay as you are (without meter) .
I opted a few years back to stay without a metre. Once i did the figures it would be cheaper without one. There are myself and MrsP, and at that time my kids were teenagers, they are now in their twenties, but still living at home. That equates to a lot of showers/ baths, and a lot of washing. Once they finally (hopefully) leave home I might consider a metre.