Sounds to me like you've got an awful lot on your plate right now.
Sometimes you just have to take a little time away from the rat-race, step back, and look at everything that's complicating your life before you can get rid of what isn't serving you well. If there's any possible way you can get some vacation time, you might want to consider doing so; as a burnout survivor myself, I can see you are getting close to the edge, but not so close that you can't pull yourself back with some R&R. Even a week off---to do only whatever makes you feel good---may be enough to refresh and rejuvenate you.
Also, don't allow your family to bully you into taking financial risks that you aren't ready to take. NO ONE has the right to demand that of you. If you do decide to move, do it on your own terms!
I'm sorry about the loss of your poor kitty. Please allow yourself time to mourn, and don't let anyone tell you it's not that big a deal. I've noticed that folks who don't have an affinity for animals can sometimes be unintentionally cruel about the loss of our pets, which IMHO are not "like" members of the family, but ARE members of the family. You have every right to grieve, to feel sad, and take as long as you need to in order to get through the process of healing.
When it rains, it pours, doesn't it? I hope everything starts looking up for you soon.