Before you decide ask yourself the following:
Do you like working exposed to the elements, hot, cold, rain, etc.?
Do you have any mechanical experience? Can you use wrenches, drills, a sawzall, etc?
Are you prepared to spend a lot money on tools, work clothes/shoes and coffee for the guys you work for?
Money-wise if you think you will make anything close to what you are making now for at least the next 3 years (under the best of circumstances) I would think of another career path honestly.