Bold claims, but interesting nevertheless. I’m sceptical of geoengineering, but efforts like these could generate useful technologies along the way.

Maybe take a look at the North Sea Link with 730 km length, 1.4 GW power rating and estimated costs of €2 billion, becoming operational in 2021.

The NSL has thus roughly

• one-sixth the length (730 km / 4300 km),
• half-ish the power rating (1.4 GW / 3 GW) and
• one-ninth the estimated costs (€2 Bn (or A$3.31 Bn) / A$30 Bn (or €18.12 Bn))

of the Australia-Asia Power Link.

Seems expensive to build above tried specifications.