U Michigan determines need not based on FAFSA EFC, but CSS profile, in addition to FAFSA, right?
https://finaid.umich.edu/cost-of-attendance/
It says here for OOS students that lower division tuition/fees in 2018/19 is $49,350 and $11,534, so total direct costs of about $61,000. All scholarship and grants and student loans add up to about $57,000.
So about $4,000 still needed.
You can try to work parttime now and in the summer to try and earn that, and the work-study money will also help, once you get a work-study job on campus and get paid during the semester.
So can you come up with that $4,000 before fall, plus books, and travel expenses (how far is U Mich from home)?
One other important piece of information is how your costs would change in subsequent years, would your U MI grant change with income changes, would it go up if EFC stays the same, but costs go up?
Upper division tuition is several thousand more than lower division, and tuition/fees or housing costs usually increase some each year as well.