Enter pumped hydro:
The $12 billion Snowy 2.0 scheme will cop further cost and timeline blowouts, auditors say, but the project has been beset with management failures and the government-owned corporation delivering the project cannot yet say how much more it will cost and how much longer it will take.[1]
My proposed solution: invite any of the 31 nuclear power reactor operating countries over to Australia to build them for us, and teach us how to do it.
1. https://www.smh.com.au/politics/federal/extreme-risk-of-yet-...