While Event/Quest/Thread is created - the creator might specify the needed props, resources (npcs/cars/food/pyro/other equipmen) so if a prop is needed - it would create a task in kanban for crafters to create it. once the prop is created - it is saved as a ready item and/or resource.
Same for scenography - if it needs to be bought - it creates a task o get it - after its finished - the item/resource is being added
The Event/Quest/Thread should show the status of dependent items - if they are ready or not