Some Catholic heretics say you can bribe God with cash so the real question is - how much "providence" can Sennar afford right now? Because I'm sure "providencing" the ruler of Georgia and replacing him with some impaling infant idiot might make the trouble go away. And the One-Natured might even offer a significant discount, the lack of wealthy followers (he doesn't accept goats, tej and baboons) must have left him pretty cash-strapped lately.
In the pinch, it might be necessary to sell the Tej Mahal we all know and love.
Frankly, it's all a question of good marketing. Granted, it might not look like much but there's more booze behind the... pallisade?... than one can safely handle. Not to mention the large zoo with many exhibits containing Gelada baboons, Gelada baboons and even more Gelada baboons. I'm sure the market is full of loaded alcoholic zoologists.