Sorry for the lack of feedback recently, I was traveling. Buidling the mids would cost around 333 hammers with stone which is pretty much 3 settlers and 1 worker. It will put us behind on expansion in terms of expansion. But if one of our competitors are not heading towards it. Well it might be worthwhile just because we have cheap lib's to run scientists on.
http://nijidraws.tumblr.com/ - Crediting the artist who made my profile pic.