The answers from Gary and Giovani can be helpful to consider. It sounds like you want an answer that no one can honestly give you. Statistics found through O*Net and Career One Stop can tell you the expected growth percentage for the job in a specific state. Anything above 7% is probably reasonable, but 11% and higher is better.
You will want to consider where the job market is best for the career. I knew someone who was an automotive engineer who lived in a city with no jobs for automotive engineers. So, unless he was willing to relocate, he was out of luck. If I am not mistaken, Toyota has a plant in San Antonio, and there could be automotive plants in your area.
I might suggest that you identify a couple of employers and arrange an Informational Interview with them. You can find some information about informational interviews on line, just by googling it. This puts you in front of the hiring authority showing interest in learning more before you pursue a career. There is a possibility that this person will become a contact person for you later on. Basically, you get to interview that person to learn more about the job, and you can ask questions like how many automotive engineers work for them, and how often vacancies occur.
Good luck to you.