I have 10 Miners and place them into 3 racks.
The terraminer have online about 1,4TH/s and not 2!
They also producing about 1850 Watt and not 1650 Watt!
I pay about 5000 / Month for the 3 Racks.
USD 1,038/kW??
Why only 3 per rack and not 10?
I guess he doesn't want to try to get 18.5KW heat out of the rack.

Not to mention it would consume almost 80 amps @ 230/240 volts.
Most racks do not have that kind of power feed.
32amp distribution strips is common.
Two strips per rack is common.
But still not enough, and it's not good to use above 80% of supply (for reliability).
Makes sense, but for 5000 Euros a month it may be worth buying an addition power strip or two and give it a try? That's almost the price of a 5 year old Audi A3, every single month!