> We already had a 42m deep well, we just bought new pumps and some tech which controls water flow, so when you open the taps and pressure decreases, the pump starts.

Are the pumps you use designed for that kind of use?

What I was told by my well company was that it is not good for the pump to run for a short time. One of the purposes of the well tank is to provide a buffer so that whenever the pump turns on it can run for a longer time filling the tank instead of just running for that cup of water you just filled.