Your dad earns $31k/year and your mom thinks that next year he’s going to give you $38k? Plus another $50k in 5 years for your brother? Where does she think he’s going to get $88k from?
Make sure you apply to a few schools that your mom can pay for out of her current income and savings. Don’t count on being able to pay with money you don’t have. Right now you have $62k ($50k from your mom and $12k from your dad). You can earn ~$3k/year if you work over the summer. That gives you a budget of ~$18k/year. Will your mom contribute a little more if you need it? If not, try to find schools that will give you merit for your stats.
If you are considering med school, and are in MI, it might be worthwhile to look at some of the smaller liberal arts colleges in Michigan for merit money. Depending on your stats, there could be schools which would give substantial (up to full tuition) for a strong academic candidate (we know a few kids who have gotten full tuition awards at schools like Hope, Alma etc). Med school apps look for high stats and shadowing/research experience (as I’m told, no personal experience). A high achieving kid can benefit from the perks of faculty attention, funded research and other special opportunities at a smaller school. If you have maximum $100k for school and want to hang on to as much of it as possible for med school, looking outside Michigan and Michigan State might be a useful strategy.