start as governor. fast settle on cropper. build treasury. create kingdom and activate. it should be done instantly without 12 hours waiting. if i remember correctly
if you start as king you have to deactivate treasury in first village ( after 200 pop) or demolish treasury via main building only after that activate in cropper. means 12-24 hours extra. depends which route you choose.
also as king you are locked down so you can´t use menhir. no resources back from fields which you need to get cropper that fast and you can´t get closer to your target so there is a chance many people will be way faster than you. there are some changes to menhir system so i can´t recall how much those things changed that strategy at this point.