I know there are several pages already so forgive me if I missed something and this has been said, but in everquest 2 when crafting in your guild hall - you could use ingredients from not just your personal inventory , but the guild crafting boxes as well. So I don't see why ppl think this idea the OP has is impossible because other games have something like this in some way or another ( not all but some ) ^_^ whether we will get that feature somehow , idk ~