Based off the last Alpha, you can also open up your home and its resources to others. So if your guildie has a house in another city, and they share the stuff in their home to the guild, you can use those chests/crafting stations as well. So spreading out your Guild will have some benefits even if the town is not sharing their crafting resources. Though if a town does share its resources they appear to collect more taxes so the town will have more to spend on growth. Interesting mechanic!
-Jeso