Money, money, money!

I'm rolling in it! Not really though. After I get done with college I will probably be left in debt up to my ears. But I was thinking, since right now I have a few thousand dollars, that maybe I should invest it by purchasing some land. It would be smart to invest my money to make interest on it because, if I am forced to take out a college loan, it would have low or no interest. I could thus be making more money on an investment than I am losing on college loans. I don't know why people don't take out loans during college and invest money at the same time so that when they are done the money they have made will have created interest and helped them pay off their debt in full or at least helped them significantly. Maybe I'm missing some important information that would not allow this, but it seems like a good idea from where I stand.