Addendest

"It's just terrible! The doors of Slytherin house turned into brick walls! Water came out of nowhere! Three hundred Slytherin students, all trapped and drowned!"
"Horrible. Were their wills all found?"
"Er, yes, they were. They left everything to you for some reason."
"How curious," said Headmaster Snalbus Dramblebam.

Addender

Maybe you don't want to include Slytherin dorms in your sandbox mode wizard school, but when you see how much money Slytherin alumni give you, your morals will be tested.

Addendum

Or Theme Hospital but Harry Potter. It doesn't matter. People want to scroll around and see Harry Potter junk going on. People with money.