Dragonsbane
Proud Grognard
Hmmm.
Without weeks off, I would say no powerful items could be made
Perhaps between scenarios?
However! Two players with the same feats might be able to work on an item together to cut down time.
No feats means an imbalance if just anyone could craft, at least it seems so. Perhaps trading a crafting feat for a class feature? No feats means you must tweak it on your own.
As far as potions with concentration, my shenanigan alarm started blaring when I imagined people downing multiple potions with concentration as a duration. I would say it (concentration) was implemented to prevent multiple concentration spells/buff stacks, so this continues that limit.
Without weeks off, I would say no powerful items could be made

However! Two players with the same feats might be able to work on an item together to cut down time.
No feats means an imbalance if just anyone could craft, at least it seems so. Perhaps trading a crafting feat for a class feature? No feats means you must tweak it on your own.
As far as potions with concentration, my shenanigan alarm started blaring when I imagined people downing multiple potions with concentration as a duration. I would say it (concentration) was implemented to prevent multiple concentration spells/buff stacks, so this continues that limit.