Just wanted to say I think these are great ideas. I’d love to see a tradition that allowed hedge magicians to gather special materials, perhaps containing vis, perhaps enrich them in the way various stones, herbs, and animal parts can be, and combine them to create items. If these items were capable of some things Hermetic magic cannot do, or does not do well, that would also be interesting. For example, a sword with such magical powers might take a very long time to create, or be something the hedge magician cannot duplicate, but it may not be repelled by Magic Resistance.
It seems to me that, for hedge magician makers of enchanted items, each item is unique. They don’t benefit from making the same item again, as Hermetic magi do. Mechanics that encouraged that trait would be very welcome.