I think adding a merchant class that can go up in level from buying/selling items and completing traveling merchant quests would be a cool idea. They could get you better prices and offer more items as they level up. At the higher level they can get a hold of goods from other civilizations that you can’t make.
Gold from nothing? It only simplificate a game which already very simple for playing.
I’m just going to leave this here…
If they require you to craft certain goods before they can go on their mission to try sell goods for a higher price in a different village in the quest i think that could be a pretty interesting fun thing
Gold is a bit easy atm but perhaps when game is further into being a complete game and things have balanced out maybe that would be a interesting thing.