Please Help my Mum get Life Saving Treatment

Hi my name is Kara. I am 12yrs old.
I just received devastating news that my Mum's cancer is back. 4 years ago she had duodenal cancer and had a big surgery (Whipples) and was only months off being considered cured.
Her cancer has spread (metastasised) into the lymph nodes and it is a really, really rare & aggressive cancer. She also has a MTHFR genetic mutation which means she doesn't metabolise medications normally. She was told chemo is the only option for her in Australia but they don't have one that is specifically for her type of  cancer. They suggested giving her the chemo for stomach cancer but they don't know whether it will have any effect or not. They said her cancer is incurable but Mum has another option to go to Japan and have cell based immune therapy which has had amazing results and has cured many people who have been told they are incurable! They take out some of her NK (natural killer) cells and put them through a process that makes them reproduce super fast, then they put it back into Mum's body to help her own body fight the cancer.  They also have some other treatments they do at the same time to help it all work really well. But it is super expensive. My Mum is worth more than any amount of money in the world so I'm asking for your help to get her to Japan. I'm only 12 and need my Mum around for a long time!! I love drama and singing and I want my Mum to be able to see what I become when I grow up. My Mum is my piano and singing teacher so I need her for that too!! And so does my brother. He is a really talented soccer player and is working hard to become a professional. My Mum wants to be able to watch his career take off. 
We need her to get this treatment REALLY SOON (in the next few weeks) so her cancer doesn't spread any further.
So PLEASE, PLEASE give whatever you can to help my Mum get the treatment she needs to save her life and be able to kick this cancer in the butt again. I need my Mum xx