get 12 year old with cancer to usa

I would like to set up this fund for my friends daughter (I have permission off mum ) she is 12 years old and a couple of weeks ago she was taken into hospital and the same night rushed into the cancer ward , being told she had a very very rare form of leukaemia , the same night she was advised to shave her hair as the chemo would make her hair fall out instantly and she donated her long hair to other kids who will need it , and by the next morning she was having her first round of chemotherapy , 2 days later she was due to go on a family holiday which had to be cancelled , she has been told she will have to stay in hospital for up to 6 months for intense chemotherapy , missing out on her birthday and Christmas this year due to being in hospital as she is so ill she could get a infection!
She is a very big one direction fan and also Justin beiber and Joey gaseffi , her dream is to go to America once she gets better , so with permission from her mum I am setting up this fund to try and get latanya and her family a nice break for when she gets out of hospital , seen as though the next 5 months is going to be very very tough on latanya , I've tried endless posts and status on one directions post asking for a short video showing they care , she was aware of me doing this and I've had no response , I've emailed their manager I've emailed them again I've tweeted and tried everything !!
Latanya has good days but a lot is very bad days , her mum has other children and is working miracles trying to be a mum and look after her other family as well as looking after latanya in hospital , it's going to get even harder as time goes on and I believe this family deserve a break for when this family nightmare is over