They'll cost way more than that.

But they'll produce the same work continuously for 24 hours a day, with x hours per month maintenance, and much closer to zero mistakes.

The automotive manufacture industry is a perfect case study. One of the first industries where such robots really made sense and were worth the cost. Especially becuase they removed people from the more dangerous tasks. Another angle I hear people arguing for robots (and makes sense).

They're heavily automated today.