Not to derail the intended conversation too much, but this is where some sort of commission system would really come in handy. You hand over the goods to an NPC, set the price for how much you'll pay for someone to craft it, and then you sit back and relax.

Crafters can then pick up player-created leves from the Adventure Guild. Some simple rules to make it more appealing for everyone:
  • Each leve comes with a timer (30 minutes or less or you get your materials back), so they're always completed promptly.
  • There is no risk of losing materials. If you fail, you can retry it again. Maybe for a reduced exp/gil reward as the Adventure's Guild will need to replace the items.
  • These leves do not detract from your overall leve count.