When the people of Springfield are discussing the potential tourism benefits of the recent snowfall, Moe Syzlak, who is shown earlier in the crowd standing in front of Chief Wiggum on the lower left side of the screen, joins Mayor Quimby in front of the statue of Jebediah Springfield, but enters from the upper left side as if he was standing behind Wiggum. At the same time, Moe can be seen in his original spot in the crowd during the entirety of his own dialogue in front of the statue.
It would actually be illegal for Homer and Marge to turn their house into a hotel as they would need a permit to do so and would face legal trouble if caught.