ANG Info
The National Guard is one of the best kept secrets. I'm active USAF now, but I was in the Army National Guard for almost 8 years.
As for what JungleJett posted, that is correct. MOST states will pay for tuition and some related fees at public universities. That is how I made it through school. The program is called Tuition Assistance (TA), and how much it covers varies from state to state. According to the GI Bill website below, Illinois ANG will cover all tuition, and certain fees limited to registration, graduation and general activities (ie, student government fees, etc). It does not cover flight training. If the recruiter said that IL will start to pay for flight training, then I'd investigate that further. Each state has different programs in addition to the ones that are common with all Guard benefits. My advice...get in in writing...make sure an enlistment contract specifically states that the state will pay for flight training (or specifically list a program that includes such training).
http://www.gibill.va.gov/education/StateNGAid.htm#Illinois
http://www.ang.af.mil
http://www.ilpeor.ang.af.mil/
However, as a National Guard member you can apply for the GI Bill program which will pay for 60% of your flight training. But be advised that you can only have them pay for one program, and they consider "commercial pilot" and "flight instructor" two seperate programs. Either way you will need at least a private ticket first. The commercial program will pay for your ratings through ATP I think, including multi-engine ratings. The Flight Instructor program will only net you a commercial CFI rating. My advice is get your private pilot's license, finish school and do your commercial pilot training after college (or get the military to send you to UPT).
I also advise anyone to get a degree independent of aviation. Professional Pilot degrees are nice, but if you permanently lose your medical ticket, then what? I have a bachelor's degree in environmental geology, so having SOMETHING in your hip pocket is advisable. Business, science, engineering, even a teaching degree can provide you a valid backup plan should you lose your health to fly professionally.
In addition to the GI Bill and TA, you will also be eligible for the Title 1606 GI Bill payments. Look below at the program...it also details the professional flight training entitlements as well:
http://www.gibill.va.gov/education/c1606pam.htm#_Toc528132104
Basically 1606 payments amount to a certain dollar amount you are paid while attending a college. It's around $270 a month (I think...it was $190 when I went to college back in the early to mid-1990s). Not to mention that as an E-1 you also get drill pay of about $160. You won't be an E-1 for long...about 6 months. E-2 pay is about $184, E-3s get around $194 and an E-4 (takes about 2 years) makes about $226 a month.
To get around $400-$500 a month and free tuition just for a weekend job, that's not bad at all. Realize that you can be subject to call up for duty elsewhere, and that will take precedence over your education. But I'll also add that the Peoria unit has already spent it's time in the Middle East, and although they aren't immune from another call up, it's likely that their turn is over for the time being (they were in the ME while I was there).
And if you enlist in an ANG unit and do well and stay medically qualified, you have a very good chance of being picked up by your home unit to attend AMS (ANG officer commissioning program) and UPT.
If I were you, I'd get down to Peoria, read up on the programs they offer, sign up for as many as you can (there are likely more programs now than there were back in the 1990s), do well in college and prove you're a hard worker at your ANG job, and state your desire to attend pilot training early...they could send you shortly after college and you don't need to spend the cash trying to get civilian ratings. Then you can fly C-130s for the Guard and still have civilian career options available.
I did pretty much exactly what I wrote above, so I've been there. I joined the ARNG (Army National Guard) in 1992 after my first year of school. I got TA plus the 1606 benefits. Along with a part-time job, I had plenty of money to live off of while in school. I was an enlisted engineer (Army construction equipement operator), had a good time during summer training and drills, and got sent to Italy for 3 weeks. Immediately after completing basic training I put in my package for flight training with the ARNG. By the time I got my degree in 1996, they had a training slot for me and within a year I was a winged Army aviator flying UH-1 Hueys. Due to budget cuts of the late 1990s, we had a glut of pilots and I found my way into the active USAF. But I owe just about my entire career to the Guard and the State Aviation Officer who helped get my training slot. Without the Guard I would never have been able to afford college, and without the people in the Guard I met, I have no idea where I'd be. Certainly not where I am now flying C-130s.