Did you run the net price calculator for University of Michigan? That will give you a very good estimate of your net costs.
Are you divorced? Do you own your own business or are you self employed? Do you own real estate other than your primary residence? If the answer is NO to all of these, the net price calculator should at least give you a good estimate of your net costs at Michigan.
Adding…you have triplets…(these are big money years for you!). Starting in 2023-2024, the FAFSA will no divide the EFC when there are multiple students in college any longer. No one knows what the Profile schools will do. But something for you to keep in mind.