I looked into it a bit more in Vlandia, what ressources ~ should be enough in Town.
Pravend: Grain, Grapes, Olives
Sargot: Flax, (Grain 129?)
Ocs Hall: Grain 400 ? Clay ~100(green) test was ~ 100 Gold/day, Hardwood was constantly buyed as i walked -> to low
and Flax (green) only ~58 Gold / Day?
Galend: Grapes, Olives
Jaculan: Olives, some Wool, (Grain146? but red)
Charas: Olives
Ostican: Flax, ~~~ Grain/Grapes/Olives ? hard to tell if enough
Rovalt: Grain, Olives, Flax (Iron Ore red, not enough produktion,..)
Grain/Brewery seams the way to go, there is more in the market.
I think the system is also not very flexibel -> Every place will have 1,2 Workshops that work and no other.
The flow of materials will most likely stay the same.
Traders Option, to bring Ressource xy to Workshop would help. (maybe Quests as Bonus)