We run 24/7 with water pump and use as much water as we want for shower and bathroom sink, but we are able to greatly reduce wasting water with with just two simple items.
For bathroom sink we have Instant-Off, which keeps water off, unless hands are under faucet.
For shower hose we use a common kitchen sink sprayer that is always off, unless pressing hand piece. Lots of water but only when needed.
We have used both of these for over 20 years and they help extend our holding tanks.