Read this thread: https://grassrootsmotorsports.com/forum/off-topic-discussion/college-money-holy-carp/142078/page1/
(This is oversimplified, slightly)
Looking at Stout's website, it looks like their tuition, fees, room and board are about $17,000 in state. Lets round that up to $18,000 for books and "other" stuff. Looking at this website, they have about a 1.1% inflation rate. Lets round that up to 2%. Note that the Stout website has annual tuition for 15 credit hours per semester, so there might be need for more than that to get the degree.
If you're financing the full amount, this would be about $74,000. Lets say this is a 10 year loan at 4% (which is lower than you'll probably be able to get), and it doesn't start generating interest until your son graduates and gets a job. My back of napkin calculations are showing about $750 to $760 a month in payment to the student loan.
Ok, great, he's graduated. Lets say he's making $45,000 annually with that shiny new degree living in Wisconsin, and he is smart, and putting away 15% to his 401k (which, incidentally, is too low for someone his age if he wants to retire by 65)- we won't add in medical insurance, because he has 4 more years that he can be on mom or dads insurance as he is not 26 yet. His take home pay is $2,412.47, monthly.
Now to the living expenses. Smart kid, found some roommates. $500 a month for rent. Student loan is $750 a month. Car insurance is $150 a month. Food is $200 a month. Entertainment is $200 a month. Cable, internet, netflix are $100 a month. Phone bill is $100 a month.
We will assume that, as your kid, he's pretty savvy with a car and has one that is PIF and reliable, but we'll still add in $100 a month in car care costs - oil changes, gasoline, tires, wear and tear, etc. He's now down to $512 left over at the end of the month - he's saving that towards a down payment on a house, because he wants to get his housing costs down. But how long is he going to be able to keep living with roommates? What if the car breaks down and he needs to replace it? Or the alternator fails and he needs to be somewhere tomorrow and needs to rent a car to get there?
None of this is ridiculous, and in Wisconsin will probably go far enough, but is the $45k starting salary really what he's going to get? Is he going to be able to stay on mom or dads health insurance? If not, add in another $100-$300 a month to expenses, assuming he's with an employer that helps out. I started at $31k in 2012 in Illinois, degree in Mathematics.
Now, lets start talking about ways to reduce this. First, summer school at the local community college. Heck, he may even be able to start with a night class or two for the spring semester. Knock the underwater basketweaving gen-ed requirements out at a much lower cost. Second, he has a job, right? If not, send him over to the local golf course, swimming pool, landscapers, etc. You too, mom and dad - tighten the belts and help out where you can. That may mean cosigning on the loan to get the interest rate down - because he is going to be saddled with this albatross for 10 years (or more) from what I can tell.
I gotta be honest here, if you don't trust your kid enough to cosign a loan for him, why do you trust him enough to go to college? My wife and I worked our asses off before and during college, after college for a while my wife had 3 jobs and I've had 2 jobs since I was 18. I had significant parental help, my wife also had a 2 year scholarship, parental help for undergrad, along with lower tuition because her mom worked for the state - we were both at an in-state school, both had AP/college credit coming into college, and even with all of that we still at age 29/30 have meat left on my wife's student loan from her masters (directly after her bachelors at the same state school). Had we been saddled with the full costs of our education (and we've paid over 50% of the total cost on our own), we would not own a house, we would not have our dog, we would not have nearly any of the things that we do... and we're still paying $300 a month on a low interest rate student loan, and will be for 2 or 3 more years.
Maybe you can take a flyer that Elizibeth Warren or Bernie will win and knock out the student loan debt (which would piss me off, because had I taken student loans and put that money in the market I'd be worth about 3x what I am now - where the berkeley is my free lunch), but I really have to caution sending an ignorant kid into the world with a financial noose around his neck. Help him out with this however you can. There is personal responsibility for your son, yes, but the college costs have risen exponentially to a point where it is arguably criminal.
As to your question, start calling up every scholarship you can find, start calling every credit union you can find, funnel as much of your income as you can to a 529 for the tax advantages, etc.
EDIT: Just to reiterate, kids have ABSOLUTELY NO IDEA what they are doing when they're signing the loans. An 18 year old has no concept of what a 10, 20, or 30 year commitment is. They have no clue what a student loan means for their wealth building power, or how it is going to impact their life. I fully support going to college, it has opened more avenues for me than trades probably would have, but I sure am glad that my dad didn't let me sign a loan to go to a private school.