Government is the biggest problem that needs to be solved. Period.
Yes, counter-productive government red tape is the only remaining real problem.
As for the costs, a solution is at hand: replace expensive, bespoke reactors with mass-produced modular reactors. Use the economies-of-scale inherent to mass production to make the cost/unit of power drop. Build modular plants, so that only relatively small up-front capital investments are required. That would greatly reduce financial risk, and further reduce overall costs.