Where ever we use the pump it is turned ON until next time we have shore water.
It is an 'on demand' pump meaning it only runs when there is a drop in pressure......that could be a faucet being opened, toilet being flushed OR a leak!
We would turn it off if we left rig for any extended time but while in/around rig it is on.
I like to keep things simple.......hate trying to remember to turn pump on, water heater on etc. When I open a faucet/flush toilet I want water to flow.
And when I use Hot water I want Hot water not 20 mins. later.
Just me.......find what works for you