I don't understand why 15 museum items are allowed, each one contributed by one household member. It seems to me that with 8 household slots, you would have 7 Sims either move out or die, resulting in -105 points. And with the museum value being divided by 1500, each of the Sims who moved out would have to contribute something worth 22,500 Simoleons to counteract their departure penalty. Or am I missing something?