1,500,000 gallons fuel low-end estimate for the tow? Gonna need underway replenishment, or a rotating team of tow vessels.
At the destination, as 90% of the berg is subsurface, a large berg due to draft must be processed in fairly deep water and employ lightering for transfer to shore; or, perhaps use a floating pipeline terminal such as the Louisiana Offshore Oil Port (LOOP).
All these numbers, and a calculator. This is like a story problem. Shovel ready for Common Core.
20 billion gallons of water for 1 million people for 5 years works out to about 11 gallons per person per day.
Not enough to flush a toilet, but maybe that’s where they save some.
Same 20 billion gallons computes to a frozen cube about 1/4 mile on a side.
Most will be below the surface. Towing is problematic. Time consuming, and the other towing difficulties mentioned. Heck, Just fly the thing up there, they have the Emirates Airlines. And their mooslime logic.
Better get started, and don’t skimp on the video. They can make a Documentary for PBS television for next year’s ERF day.