To the OP: I really admire your courage in having such big aspirations in golf. It's truly inspirational to see someone who has set the bar so high and is willing to work so hard to achieve his goals. Not many people are willing to even think about putting that much effort into something. If doing this is what will make you the happiest, I would say that you should attack it with your best effort.
Some advice though: Life as a professional golfer is tough. You have to be realistic in your hopes, it is unlikely that you, me, or even anyone on this forum has the ability, even if working as hard as you, to become a moneymaker on the biggest stage of golf. As a result of this, its probably best for anyone with aspirations of professional golf to set the bar at the lower level tours (which, mind you, are still incomprehensibly difficult to make). Even golfers who do well playing in these tournaments struggle to make ends meet. It is expensive, hard, and unfulfilling, unless you believe your sole purpose in life is to play golf. Think about this: how would you ever have a family living like that? What happens if you run out of money on the road? Worst of all, what happens if you don't quite reach your goals of playing golf professionally? Because of the inherent risk implied by these questions, it would be wise to have a backup plan. The people here attacking you because you don't have a backup plan, while aggressive and vicious, are probably right. By saying you should have a backup plan, they do not mean that you have no hope of ever achieving your dreams. They're trying to give you helpful advice, looking out for your well being! There are many reasonable plans in life that involve both golf and maintaining a reasonable and stable lifestyle. It would be wise to not only work on your golf game, but also have some other form of income as well. Have you thought of attending college? It is a worthwhile investment that is a great help in securing your future. Life takes a long time, you're young and you have all the time in the world to play golf. Attending college is a great way to secure a stable lifestyle that will allow you to go after your dreams of professional golf, but first you will have to wait a little bit so that you have a solid job from which to support yourself first. I know that not everyone has the means to attend college, but it becomes easier every year, and there are many options for people from all different backgrounds. Just something to think about.
I know that this post probably looks long and boring and you probably won't take the time to read it, but I think there is some helpful advice in it that could help you on your path. Good luck to you sir.
Edit: here is a thread discussing the ins and outs of golfing professionally, and the reality of it: http://thesandtrap.com/t/63941/seriously-could-you-have-made-it-to-the-tour