I'm 19 and about to buy my first 2-4 unit apartment but haven't yet, however if I could of went back a few years with everything I've learned now just make sure you're always learning, reading, etc, don't spend your money on stupid things like cars and clothes, if you get a job and keep saving you should have money for a 5% down payment on a property by 18 or so, if you're going to college you can buy a 2-4 unit (duplex-4 plex) or a cheap house and rent out the other rooms, that can go in general too not just with college, and don't buy a brand new car, get at least 3 years old because a car loses 40 percent of its value over those years, you can get a very low mileage older car if you hunt for it, new cars are financial suicide to young people, ideally don't spend more than 10% of your income a vehicle per year, that may be hard depending on what you do, and invest every penny you can while maintaining a safety net (at least a couple thousand dollars to cover expenses, etc) that way you don't have to pay abhorrent credit card interest rates.etc