As a DM I dont worry about it because:
As a player, I bought a bunch of arrows (300 IIRC) stuck most of them in a bag of holding, and didnt run out in 6 levels. Game ran out before the arrows did. I did occasionally have to take a couple actions to get arrows out of the BoH when my ready supply ran out, but that was maybe twice.
As a player, I bought a bunch of arrows (300 IIRC) stuck most of them in a bag of holding, and didnt run out in 6 levels. Game ran out before the arrows did. I did occasionally have to take a couple actions to get arrows out of the BoH when my ready supply ran out, but that was maybe twice.