AITA Save the cat or the marriage?

Our beloved cat of 9 years became unexplainable sick. Test after test can’t tell us what’s wrong and the bill is now over $10,000. I’m taking a second job, signed up for care credit, and have cancelled every subscription I have and am selling everything to my name that’s worth anything. I drove her 3 hours to a specialist. The only thing standing in our way of helping her is money. She’s not on death’s doorstep, just can’t figure out how to treat her. Husband decided she (and I) aren’t worth the money and is cutting me loose with nothing to my name. He makes over $100,000/year and I make less than $2,000/mo. He thinks I’m nuts for spending that much on an animal, even though I probably got more emotional support from her than I ever did from him. AITA for spending $10,000+ for a beloved furry family member? Oh yeah, I forgave him for cheating years ago.