Buy a radio station.
Seriously, you're going for an MBA and you want to work in radio?
Here's what you do - hire an agent. If you've done any radio in college, put together a reel and shop it around to some of the smaller agencies. Or see if you can get in the door to do industrials/commercials, and build a reel. Then see if your agent can get you a regular gig - overnights, weekends, anything to get your foot in the door.
Oh, and get a day job. Preferably something that pays well.