I believe it's supposed to be all veterans from what I read on military.com. I don't think private colleges are under this, but all state-funded schools are.
Works for me, even though joining the guard I got my tuition taken care of and active duty GI Bill. Either way, Uncle Sugar is buying my Duramax next year.
No. You won't find much in the way of tuning, you'd be lucky to find it. Intake and an exhaust may net you anywhere from 5 to 10+ RWHP, but don't expect much more than that. Do those on top of a cover and you'll be pulling some decent milage.
Tonneau cover, cold air intake, and maybe a magnaflow exhaust. It won't be as raspy as most I've heard. I wouldn't even touch the suspension if it were me.