There's another way to earn infinite money without having to do anything illegal. Become a vampire and complete the Cure for Vampirism quest. At the end of the quest, talk to the Count of Skingrad about "Reward" to get the 1,000 gold reward. You can then continue to talk to the Count about "Reward" to get 1,000 gold every time. Take advantage of this bug quickly! When you're done talking to the Count, he'll head upstairs to his chambers, which are heavily locked.