ExperimentalAB has a point...if you don't like machinery, you're not going to dig it in the long run. But with your flight experience, you should probably know by now.

From a career-changer perspective, it will only be worth it at your age if you made good use of your decade in business. You will want the house paid for, retirement funded, cash for training, plus a survival fund to make ends meet until you are a regional CA. Or have an understanding spouse with a high-paying, portable job (doctor, nurse, etc).

You will have to be prepared to move to your job location, or be VERY selective about working only for airline(s) which junior domiciles which are commutable from your home.

Also, with the long-term uncertainty in oil, be prepared for the possibility that your career will stagnate very early on...most of the economy can adapt to alternative energy, but it will not be so easy for passenger airlines.