I'm running a D&D 4e campaign. There a player has worked very hard and somehow *tricked* me into becoming a king of an evil kingdom. Good for him he deserves it. However, how do I keep him from:

 1. Going into his towns treasury and looting all the gold and buying everything in the D&D manual.
 2. Rolling his army out to do quests for him.

Furthermore, how do I challenge a king intellectually and in battle. A personal army would be very annoying for me to maintain and or fight. Imagine rolling 20 times per turn. 

Any thoughts at all would be appreciated.
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