EDIT: I dont realy like how NPC Lord are made to think, they have unlimited recoures, once for a test i destroyed whole economy of "Slave king" and left only Mercenary camp, he kept creating Archers and Whirling derwishes even though he had 0 gold or recoures, they are simply made like "20 Archers and 5 Whirling derwishes to tower to defend lord" and guess what, he keep creating them and sending them to the lord, with 0 gold or economy!!!