I agree, it seems like it would be astronomically expensive. Setting up a heat exchanger/generator plant on a floating platform (with a step-up transformer for distribution), running the loop piping down to the seafloor, and HV cables hundreds of miles long seems like it’d be an order of magnitude more expensive to construct and operate vs a geothermal power generation station built on land.

I am curious how operations and maintenance will be handled, one of my customers is a CH&P plant that has two annual plant shutdowns for maintenance.