I could definitely see this game being something I'd play for hours. It's exactly my kind of thing!
I'd only recommend a (maybe optional?) tutorial that gives players a decent starting point for their first game. I had to restart a couple times when I realized, for example, I'd made land plots too close together and failed to account for the families' professions because I was just trying to give everyone shelter. Oh, speaking of which -- it's a bit odd that walls for shelter are optional.