I'll invest 125 of my gold so he can build the workshop.
Everyone only has 100, as Tristan said, though there's a post by Red corner way back saying that 480 gold was earned. Perhaps if it were distributed, but I can only take 100 as of now since that's what Tristan said.
However, upon construction, this will entitle you to 1 item 50% off of normal price.
BTW. Roll for time it takes to construct a workshop.