Harvest mechanics for a city builder

Hi! Making a medieval city builder in the vains of banished, anno and stronghold. For harvesting resources like trees and surface stone I see a couple of options: 1. Buildings harvest in their vicinity (woodcutters hut in stronghold, almost everything in anno) 2. Unassigned workers harvest resources that has been "marked" for removal (banished) To me the first option is more streamlined and resource income will be more even. The other one demands more input from the player and resource income will come in chunks. What are your thoughts and could you come up with another solution? Thanks! Erik