I'd have to add enough buildings/resources and simulate enough units at a time to make it realistic.
I only have plans for 15 buildings. Anything else would have to be added by other people or wait until after States and Corporations. That's probably 20 years away though. But I don't know. I've been working on Corporation-States since 2011, maybe 2010. 2008 if sketches count as work. I have several other projects planned and most aren't about economics.
Food (consumer goods) is a generic resource and so it can't have a real price. So is factory's "production".