Are you out of state for UC Berkeley or UIUC? If so, you should take those 2 out as they give little to no financial aid to OOS students. If you're OOS for Michigan they do give decent aid but depending on your budget, it most likely not be what you'd want.
Do yourself a favor and make sure you do the Net Price Calculator for each school. It gives you a good idea on the potential cost it could be after aid based on your finances.
As for targets, where exactly do you reside in your state? For a student needing aid, it's generally a good idea to look at more state schools in your state as a target. Generally speaking, almost any good university is going to have a good math program. For example, if you live in NY, schools like Stony Brook, Buffalo, Binghamton, and Albany are all good choices for mathematics.