Even if all three cost the same, and on contrary to what some may tell you, WUSTL are Notre Dame are no better than Wisconsin. In fact, for Engineering, Wisconsin is the best option of the three. If money is not a concern, go for fit (although Wisconsin is the clear winner for Engineering). If money is a concern, then Wisconsin is a no brainer.
“If you can afford it, definitely pick ND or WashU over a state school…”…because the state schools where I live are mediocre at best…