The museum is a community lot. With so many collectibles, it wouldn't really fit on a home lot unless you picked one of the biggest lots and then the bills would be HUGE. And you're right, you just drag and drop out of your sim's inventory to fill the museum. :) Sims can marry and have kids at any point. And correct, the…
I can't wait for this world to be complete. It looks amazing. Have you considered releasing a "lite" version with empty lots for the players to fill in?