Help me and my sister GET OUR MUM BACK

Help me and my younger sister get our mum back!    No no she is not missing, or being held ransom. She is a victim of domestic violence and has been for the last 10 years.  Almost two years  ago she found the strength to finally leave her "husband" but has not and won't for a long time manage to rid the emotional scars this has left her with.  My mother found that the easiest way and possibly in her head, the only way, to deal with her issues was to turn to drugs.   My younger sister  is only 16  and she knows a little bit, but doesn't completely understand. I've done my best to shelter her over the years, but sometimes failed.    My to mum has reached a point where she knows she needs help and I need to help her. She has agreed to attend a drug rehabilitation program, but i don't have the funds to get her there.     I already have a little savings but need a further $9000 to get her the best rehabilitation centre so every cent counts.    This is my mine and my sisters (potentially last) shot at having a mum in our lives.    Thank you.