Well, that depends. ITER is tens of billions. The most expensive part of this reactor would probably be the petawatt laser, which is tens of millions for one-of

Well, that depends. ITER is tens of billions. The most expensive part of this reactor would probably be the petawatt laser, which is tens of millions for one-off experimental devices. A turbine and generator is about a million dollars per megawatt, so it could be a significant percentage of total reactor cost, especially in mass production.