The quantity of gold & longbows received from these provision house items are vastly out of sync.
1000 Brew = 10 Gold Coins. Even taking into account the difference in server economies, you can sell 1000 Brew for more than 10 Gold Coins. I think it would be more reasonable to be be 500 Brew = 10 Gold Coins. As an alternative remove completely and allow converting 100 Brew into a Barracks buff that reduces the production time by 10% for 2 hours.
500 Bows = 10 Long Bows. Really out of kilter! 500 Bows (4000 Pine Wood) does not equal 10 Long Bows (160 Hardwood). Using the same ratio as Pine Wood Planks to Hardwood Planks (250 -> 50) and factoring time (1 longbow takes double the time to make as 1 bow), this should be either 200 Bows = 20 Long Bows or 500 Bows = 50 Long Bows