GameDynamo - "There are many side quests in Assassin’s Creed IV: Black Flag that give you some spending money. This is good, because upkeep on the Jackdaw, your hideouts, and your crew can get expensive. One side mission you can do to get some extra Reales is find warehouses all across the map. These guarded warehouses have some pretty sweet rewards inside, so plundering them is worth your while. Learn more about finding these buildings below."