Bee, I have been going through the same with my mum who is 62. she has been drinking heavily for years but i would say her health started to badly deteriorate about three years ago.
she has been seriously ill many times with everything relating to esld.I too have been asked about the DNR order, which is a hard thing to be asked.
As far as the alcohol is concerned my mum is not strong,totally helpless.but she is so strong in many other ways.she has came through so many things in hospital, i am surpised she is still here.
i have been through so much, most important thing is get educated about the disease, you could be in for a long haul. and yes, even though your mum is soi lthere might be a small chance of recovery for your mum if she quits drinking. try and share the burden with family, do not take it all on yourself. look after yourself, everyone here on this forum has been through this or similar, this is a great support which will help you so much.
anytime you need to talk i am here