One of my sons does that talk in circles thing. The badgering. Repetitive. At this age it's defiance. I am not sure what it is at an adult level.
It's draining. It sucks. It might have some obsessiveness and compulsion behind it, for him.

One thing that stood out about your husband's "rationalizations" is the mention of retirement planning and companies nearby don't offer it? He's only been there for a little over a year. I'm left asking to myself-and now here-what retirement planning?? Is there some sort of longevity in his job history? What reasons are those other 2 applications not landing him a job?

Is the need for new and exciting a way of running from himself? Where's the stability?

Are you in any way self sufficient or capable of being so, in a pinch?