Have to agree with playtime, one of the wisest men I know. That's amount should just about see you through. 18 is quite young though and I would consider Uni or similar seriously as you have the rest of your life to be a pilot. It might be sensible to have another feather in your cap come huge oil price increases and job layoffs.
I know what I would have done in your shoes but my sensible hat says think about it. Be sure it's what you want!