Changing the Loot/er code should be easy, but not sure how to implement the garrisoning if it's not a treasure. Players often look at resources of allies, then decide how much donations are needed. But if it takes a half a minute or longer when one is suprised by a fight, then it might be hard to coordinate. If the unit has to travel, it might be too dangerous to transport. That might be considered a feature, not a bug, but I'm dubious.