Aloha!

So I was just offered a little village in an RPG to rule myself, and of course my first act as Sovereign will be a map But a simple question is in my way: How many buildings? Usually I just draw as many as I see fit, but this time I know the village has roughly 400 inhabitants. Some if not most will be peasants, but there are also some craftsmen, two shrines, a creek and probably one or two wealthier households (traders or something).

What's your guess- how many buildings should I draw? How many people live in a peasant's or craftsman's house?