Alone the Mall house water package Tano L costs 5.5k€ with a 5000 liter cistern, plus the excavation of the construction pit + connection to the water supply. That smells more like five figures.
yup, just checked. The invoice was from 10/20/2020 for 3265.63 euros (minus 3% discount) for the package including 5.8m³ cistern.
Crazy what has happened there. But I would definitely ask for the current price at the building materials dealer, that was cheaper than the manufacturer (even though they produce here locally!)
My nephew has a plastic cistern of a few thousand liters, I think I heard, for less than 1K? He also buried and connected it himself with some support.