[hawski]

They may know exactly how to build something and what they need, but as I understand it they would not get full documentation about the island itself. What resources are where and what the composition of ore exactly is. So they have to develop an understanding of resources they have and that requires a laboratory and sensitive equipment.

Either way I think that lots of machinery has to be supervised 24/7 and they can work only 12h a day per rules so they would probably be left with only 10 simultaneously active workers. With 10 workers I would say it's just impossible.