I saw your post a little late ( 2 months or so ), but I had to post. I am currently 17, I have been developing since I was 10. This year I was able to get a job with a successful development company in a city near me. It works great for me, its remote, their is always work to do, I'm getting real world experience, and I'm only 17.
You can honestly do any thing you put your mind to, and if you think your ready to take your development career to the next level, and become a freelancer, don't hesitate. Seriously look at your skills, and ask your self, if you have the skills employers are looking for. Employers like mine, do not care about age ( unless its Facebook, twitter or Google). So start with freelance, on a site like this, and then move to a full job ( or career ).
That's just my 2 cents though, feel free to PM me for questions/advice.