Eligibility for Social Security Survivor Benefits?

I am 49 years old and was diagnosed with a rare terminal lung disease about 13 years ago. At that time, my mother who is now 73 chose to take early retirement to take care of me. How grateful I am. She receives Social Security and I receive Social Security disability, as I am no longer, nor will I ever be able to work again.

My question is, the tables have sort of turned. My mother has fallen ill, very ill, and we rely heavily on each others' income. I could not survive without her check, and she certainly cannot survive without mine. We are both curious if she were to pass would I be eligible for her benefits? She receives a very small amount of my father's, as he is not retired yet, and is a real jerk, but she does receive something. Would I be eligible to receive her benefits because I am disabled and won't even be able to afford a port a potty to live in if she passes?

If I were to relocate to a different state, my benefits would follow, obviously not medical but Social Security would be okay, correct? California is just so expensive.