Yeah... I don't see any T7 or T8 costs in the Quest or Research listings. Which leaves upgrade or Guest Race production costs. I was hoping to get a collected listing for the Chapter upgrades.
If I read it right, you only need T7 and T8 (labeled as A1 and A2 in Fairy's Notes) for the building and upgrade of the Guest Race buildings, and their proposed GR building would need 3.75M T7 and 2.62M T8.
Weird. Chapter 18, needed T7/A1 to produce the Elementals Guest Resource needed for Research for progress in the Guest Race, while Chapter 19 does not use either T7/A1 or T8/A2 in Guest Resource production.
It's still annoying that Elvenar's own wiki doesn't have a bit more info or more advanced chapter guides. Everything has to be player-gathered-info dumped on third-party websites or different forum sections on multiple fora. If only they provided (or at least collected) all the info in one spot...
To be fair, to satisfy the various needs of the various players, they would either have to post the information in multiple forms, or in some multi-dimensional pivot table.