Current Value: 10
-Mine: 10 - 3 = 7
-Temple: 7 - 6 = 1
-Wall: 1- 6 = ( -5)
-Elders Quest: ( -5) + 1 = ( -4)
-Free veneration from faction quest to build the temple: ( -4) - 1 = ( -5)
The provinces are then forced to do one economy generation as they're unable to cause negative stats and Oshha has stated that they choose farming. If they won't put us into negative, they perform their policy.
-Province farming: ( -5) + 5 = 0
-Province farming: 0 + 5 = 5
They may not do two farming as that may lead to a [MAIN] farming, but if not farming then it'll leave us on four temporary economy, which seems like a fine shield to help our civilization weather any temporary economy damage.