How would you handle? (Ex-GF) long...

First time poster, long time lurker.
Started dating a beautiful woman two years ago. Pretty quickly she told me she had a brain tumor that would eventually kill her. She quit her job after about 3 months of dating and I began to support her fully. Bought a house later that year, and she moved in, as I continued to support her.
Fast forward, as she has brought a number of guy "friends" into her life that she swears are "just friends," but we know what is really going on. It pushed us apart and created a resentment between us.
Fixing her became my priority, and I ended up leaving my job due to stress and poor work performance.
I ended up getting a better job halfway across the country. We grew apart, have separated, and now I want to sell the house, and move on with my life. She has threatened me, basically saying that she has nothing to lose, and if I put her on the streets, she will kill me. She is connected to some underground organized crime figures, so it is a threat I take seriously.
She also has a vehicle that is in my name. Her health insurance is through my employer.
She has requested 12 months in the house, me to continue to pay for her vehicle, maintain insurance on her, and give her an allowance for 12 months until she gets on her feet. Anything less, and I don't want to know the consequences.
I cannot afford to continue supporting her and to restart my life.

Looking for advice.