Which begs the question of how we get metal in the first place.
Is there going to be some sort of crafting system for making things to sell to caravans to get metal? Or are we just trading food and raw materials at this point?
Also, will migrants show up with equipment of their own sometimes?
You get metals randomly by creating a "mine". This is like an outdoor building which goes underground - no DF-style, i'm afraid! You then generate on and off, once in a while.
I've worked out an idea... First you build an empty house, then set it to be a carpenters (or masons, or metalsmiths) workshop. Then a villager is set to be a carpenter, and players can pull anything out of it for one log/rock/metal. A cabinet. A chair. A table. a statue of a dog with one eye - whatever the player wants.
Migrants will show up like peasants in DF, nothing on them.
I assumed we'd need to build a trading post, and then trade raw materials. How are you handling crafting? For example, if I trade for metal then can I make my own picks?
And for things that don't need tools in DF, like bonecarving or stonecarving, do we need to set up buildings as workshops (maybe just generic ones)?
Which would mean a building would need a W tile in it to show that it's a workshop, and it can't be used for a granary or dwelling.
Or are we ignoring crafting and just trading for finished goods?
Trade post = Caravans, eventually. I think I answered everything else above.
I'm currently writing up a "rulebook" for MyWorld: Kingdoms which will be on an exterior site. I'll release it soon, maybe with the next update