Thanks for your work, it helps a lot!
I would like to bring in something that worries me.
Several buildings halve the cost of lesser bulidings. So from a pure numerical point it would be wise to build them first.
That streches my sense of fantasy quite a bit as a settlement tends to start with the lesser buildings first.
What do you all think about reducing the cost of the higher building by the amount it would have saved on a lesser buliding if this building is already completed (turning the synergy around)?