Would you go on a job interview knowing that you are unlikely to accept if offered?

I was contacted by a recruiter about a job out in Tucson, AZ. I didn't solicit for this job. The recruiter contacted me at work of all places. So, I set up a time to listen and did the phone screening process with the hiring manager and now they want to fly me out.

The problem I have with this opportunity is the location. Even though it would likely be a great opportunity for me, it wouldn't be that good of a move for my wife. Tucson isn't that big of a city and it's mostly government contractors out there. It would be hard for her to find work given that the city itself is barely larger than New Orleans. Because of that, one of my requirements to move is any offers that I entertain must be in a fairly large metroplex area so she'll have an easier time trying to find a new job.

The only way I would consider this opportunity is if they are willing to pay a lot more than what I make now (which at a minimum is about 40%) so the move would be beneficial for the family as a whole.

So, should I continue on with this and fly out there knowing that I would likely decline if I'm offered something.