How many decades or centuries after someone manages to manufacture a brick that doesn't immediately crumble on the Moon do you think it will take for an automat

How many decades or centuries after someone manages to manufacture a brick that doesn't immediately crumble on the Moon do you think it will take for an automated factory to crank out satellites with the computing power of a data center and the associated solar panels and radiators and launch all of that mass off the surface of the Moon. What's more, he owns an LLM that could probably take a pretty good guess an answer. Either he didn't bother to ask, or this is for the consumption of uninformed space enthusiasts.