Good call on the actual price. Still 1/13th the current cost of the not-yet-operational ITER... Makes me wonder if the stellerator concept will be more feasible in the long run.
I don't think you can draw any conclusions from comparing the price of Wendelstein 7-X and ITER. ITER is much larger than Wendelstein, it looks like the magnets in ITER are roughly 10 times as heavy, so ITER needs much more material than Wendelstein.