@Joshua Milam there's some truly awful advice here. We definitely seem to get this question occasionally. College can be extremely valuable and will put you on a better trajectory to make more money to invest. You will not be better off just reading BP and the internet.
Real estate takes a lot of money. It's not like your friend will be able to buy one rental and retire. Unless they've got $1 million lying around, it's going to be a major uphill battle. Even $1 million might only generate $80-100k/year, which is great but still maybe not enough to "retire."
I've heard a stat that something like 90% of real estate agents fail in the first two years. It's a really tough business and should not be your friend's only plan.
See if your school offers a real estate degree, it's what I took. I knew RE was where I wanted to be. You can learn a lot and also have the education to start you off with a great career that will allow you to invest and build your own portfolio.