Should I sever all ties with my mother?

My mother refuses to respect me, my marriage and my decisions because she is mad that I cannot afford to pay her rent for the house that we live in, that My grandmother left for us, not to mention the house has been paid for since 1980, until my husband graduates from school and finds a job. I explained my situation to her and for a while she was fine . My husband was laid off in 10/09. He collected unemployment and went to school. We do ok. He will graduate in August. My mother feels I should not invest in him or his education and he should have worked instead of being on UC and should have looked for ememployment sooner, instead of going to school. He neeed to go to school and he has benefitted so much from it. She claims I will take care of my husband before I take care of my kids, that I should not pay for his medication for his diabetes, and because my husband is on UC he's freeloader and we don't deserve to live in the house that my grandmother gave to us. She uses fowl language, and is just generally rude. I hate to cut her loose, but for my own sanity and to keep my stress levels in check I think I should. She makes me incredibly angry with her demeaning tone and her views of marriage are off the hook. She really thinks I should terminate my marriage because my husband is not working. At last I checked marriage vows included for richer for poorer for better or worse, in sickness and in health right? Maybe that's why my dad left her? It's all about that almighty dollar with her. Please help...