I would have to say that it's how long can you stand with a challenge?
If you like it, and ready to spend your money (hoping you're covered for the rest ...house...wife...children...).....then get into it, or dye dreaming.....It's true your chances of a job may be very little comparing to a young pilot with more hours, but you never know what life is hiding to you....If it's your destiny, then you'll certainly do it.......
Once a singer said "Keep the faith"