Survive Stage 4 Terminal Cancer

I want to survive my terminal diagnosis for my family. At 39 I got early breast cancer, chemo and treatment and I recurred a year later with lung metastases,  so more hideous chemo.  We fought hard but it was expensive. It bought me a good 9 months of quality time with my kids. Then I got 8 brain tumours, lost my hair for the third time and had to have global brain radiation. My oncologist is still trying to be positive but my diagnosis is 6-12mths. I want to beat this and leave something other than debt and sadness for my family. To do this I am following all the positive advice I can find and seeking treatments from many places. I am also trying to fulfil wish lists to do with my family now just in case. Creating memories and living joyously. Fitting 40 years into a few. 
My beautiful children Eli and Lucy and my husband of 17 years Tony need me here and I need to be here with them. I want to grow old and grey with him and see my grandkids. But if I can't I want them to be safe and have the resources to give them the time to grieve.