Should I change disciplines for more job opputunities?

Basically the title. I have been working as a civil designer at a firm about an hour away from my house making the drive each day and it's really starting to wear on me. I have been trying for the last 6 months to find a job in the same discipline (Civil) closer to home but no luck. I work near a major port with plenty of piping and electrical designer positions open at Ingalls and Bollinger Shipbuilding but to take one of those positions I'd be taking a pay cut, of about 20%, and starting back as a designer 1. Has anyone done anything like that before and felt it was worth it or do any of you have any other ideas?