@Hydro: OK, here are my thoughts. Make sure to check who owns what, I can't remember all of it, but I'll try my best.
X35:
Seminary and Church School should go down to 150 a piece, while Gallows, Civil Service School, Archery Range, and Servants Quarters should be bumped. Ditto for all Castle sub-buildings, but the Castle itself can remain more expensive. For Wonders, all of the WWs need significant increases, but the NWs are good it seems.
X36:
First of all, the Apostolic Palace is a special Wonder, so it should cost more, say 1500. The Gambling Hall and Terrace need increases, while the Hand Pump and the Great Chinapa should be reduced to 150 each. Otherwise this one is good.
X37:
For this one, basically all of the WWs and the Surveyors Office need changes.
X38:
For normal buildings here, the biggest culprits are the Artesian Well, the Optometrist, and especially the Paper Maker. Again, all of the WWs are too cheap and need increases. You'll notice this more as we go down the tree, I'm trying to make building a Wonder of the World a more monumental undertaking, I hope you don't disagree with that philosophy.
X39:
Normal buildings are Town Clock, Rendering Plant, and Castle Garden, although that one can be a bit cheaper (120 or so). Again, the WWs are the main culprits here.
X40:
Salon should definitely come down to 200 in cost. Other than that, the only changes necessary are to the WWs.
X41:
All four Clockpunk buildings should be increased to cost 200, as they are alt-timeline. Otherwise only the WWs need any change.
Note that for the WWs many either belong to DH or Vokarya, so I'd like their input on those as well.