Oofh. That's a tough one. Based on VIN it looks like WSU would be ~25k lower in tuition alone looks closer to 100k by the time you evaluate COL. I'm all for going to the cheapest option- I left my instate for WSU because it was ~30k cheaper but the whole 3 year vs 4 year program and support system I definitely understand where you're coming from. Is there a chance your husband could come with you? I suppose my advice to you would be to take a step back and evaluate yourself as a student and your post graduation goals. WSU is very much the traditional vet school experience with regular breaks 3 years of traditional didactics and 1 year clinicals. Plenty of time for extracurriculars and summer opportunities like externships. UofA is very different being accelerated, from what I've heard is much more tons of self guided learning and come to class to apply so a more case-based approach. Not as much break time, from what I've heard through the grapevine your minimal down time is usually spent catching up and not a true break. You also need to consider if having a teaching hospital is important to you vs a distributive model. I know for some people the distributive model is hard because they're constantly moving during their clinical rotations with no true set place like a teaching hospital where you can take 2/3 of the year in one place.
Pros of UofA- you'd be done ~1 year earlier, family is close+/-distributive clinics
Cons of UofA- they are still growing and changing, more expensive, less breaks, less opportunities for traditional summer externship things+/-distributive clinics
Pros of WSU- cheaper, established, traditional breaks and summer opportunities, +/-VTH
Cons of WSU- weather (trust me my AZ friends complain about the cold ALWAYS

), 4 year completion, further from family, +/-VTH
I think if you really evaluate 1)yourself as a student (do you need those breaks) 2) goals post DVM (are summer opportunities important to you) and 3) COL difference of possibly living in Pullman by yourself vs what potentially sounds like living with your husband and him being responsible for housing, food, etc
I wish I had more helpful advice to give. I personally chose to move away from my support system for the cost savings-ultimately my husband ended up moving with me, but that wasn't the original plan. PM box is always open if you have questions about WSU or other things in general. Good luck with your decision!