My father died when I was little, and I really don't ask about that part of my life, so I don't know if they thought about being divorced or not. I want to say no, because it sounds like they really didn't have problems with each other, just money.
As far as my mom and my stepdad, my stepdad's threatened to leave the house for another, better-paying job many times, but that hasn't worked out for him. Even if he did leave for a job, they wouldn't get divorced; my mom would just join him when she retired, or she would've tried to get assigned to a nearby base. They might fight, but they can solve their issues.