3 billion/epr is fairly reasonable for an average cost of a 20 reactor buildout in Germany. Germany has historically had lower nuclear construction costs than the rest of the western world, and 20 is enough to get major savings from series build
The trick is to give support to the early projects and make it possible for costs to tumble down before the absolute cost of the support mechanism becomes too heavy a burden on the system. For wind, this happened rather successfully; for solar, it seems to be more difficult.
It can still be argued that it can be good long term industrial policy, but we are at the most difficult junction right now - already some scale, and still high costs. Wind power
