Sure, but you can spend 10B a year for a thousand years and you still won't be anywhere even approaching 10T in today money. We could just do both and it would

Sure, but you can spend 10B a year for a thousand years and you still won't be anywhere even approaching 10T in today money. We could just do both and it would cost the same, for all practical purposes. In any case, if those power plants have a great ROI, they will get built very quickly without having to be publicly subsidized.