I'm getting a new house and looking at another mini renovation.

In my previous house I've renovated, the water tank and the water pump (Grundfos) is placed on the roof.

This time around, after looking at how other countries have implemented water tank and water pump eg Thailand, I wanted to move the water tank and water pump to the ground floor just after the main water inlet. Wanted to know if this is feasible

The way I look at it, with the water tank at the roof, I will never ever clean the tank due to safety reason and the heat. Also maintenance will be difficult for the water pump, although I've never has any issue with it.

Nevertheless, if I were to go ahead with my plan, what are the drawback. One contractor was telling me, the water pump will be working more as the water need to pump upwards before it gets distributed to the entire house.