Michigan State stacks scholarships. My son was a NMF last year and is attending on what is essentially a full scholarship. OOS students who are NMFs and select MSU as their top choice get free room and board and $4,000. Admission to the Honors College (which is not nearly as competitive as other schools) will get you in-state tuition and another $3,000 and the opportunity for a Professorial Assistantship worth an additional $2500/yr. Individual colleges also have scholarships available - the CoE came up with an additional $1500 for us.
They are also starting a Computational Science program in the next couple of years and have recruited faculty from some of the top schools in the U.S.
If your son applies, he will almost certainly be invited to compete in the Distinguished Alumni Scholarship Competition. This is essentially a recruiting weekend for high stats students. The odds of winning a full scholarship are long - but the school does a great job of selling itself and you would have a chance to make personal connections with people who might be able to come up with additional scholarship money for you. Our initial FA package would have left us with about $10,000/yr to cover. At that point, Northwestern and Amherst College were at the top of his list. By the end of the Spring, we thought we’d have to cover about $2,000. When he enrolled, he wound up getting a check for about $700 with another $1,000 to follow when National Merit Scholarship money is sent out.
MSU is not the state flagship, but is a top 75 National University according to USNews (for whatever that’s worth) and, I believe, a Top 40 National Public University.