Life expectancy for acute stage V renal failure?

My mom had sudden renal failure a week ago. Her creatinine level was a 10 and the lowest they've been able to get her to is a 7 with dialysis. They aren't sure what has caused it but she has a blood disorder (PCT) and they believe it may be related. However, she is too unstable to do further testing they need to determine the cause. She is highly anemic at this point and she has a UTI that she cannot seem to get rid of. They also said she has kidney and gall bladder stones. She cannot seem to go more than 1.5 days without dialysis at this point or her levels get too high and she starts getting sick. She is only 53 yrs old. She's been in the hospital for a week and they are moving her to a rehab program today but expect her to only be there for 1 week. She also has a history of mental illness (severe depression and anxiety) and with her blood disorder it has caused a severe skin problem that has disfigured her skin. This contributes to her depression. I'm very concerned on how she will be able to continue dialysis on her own 3 times per week. As of now, she cannot go more than 1.5 days without it and they expect her to go 2.5 when she is home. They just tell me "she should" make it through those days. They said her kidneys are functioning at about 5%. She is on medicare and I feel like that is why they are pushing her out... I do not feel that she is able to do this living independantly, but if she cannot get any better, I'm not sure she will want to continue on. Anyone have any other information you can provide? Please!!