Sometimes you can get lucky…
My D applied RD and was accepted to state flagship school UIUC, Purdue, Rose Hulman, Iowa State and Northwestern. We were able to look over the FA offers- and it was cheaper out of pocket for her to attend NU. When it came time for S to apply, he applied ED to NU - and was accepted - and because of D’s experience, he knew NU would be less expensive to attend than any other school. Good luck to all of you that have to make the tough decisions.