May I ask, is this your first treatment for alcohol addiction?
I ask because I was an addictions counselor (in a previous life) and while the programmes are run differently in our respective countries the premise of recovery is the 'same'.
I am happy to chat about treatment if you like.
As for your question of 'here or there' ... only you can decide what is 'best' for those left behind. Having considered this a lot for myself (and only myself) I have decided it probably wont make any difference to their pain and so its all about logistics and preparedness and leaving as little mess behind for anyone to tidy up.
I look at my life atm and know I cant leave it because my organised personality doesnt allow for leaving behind a mess. This means I recognise that I am not ready to let go yet ... when I get organised then I will either be ready or have found a way through.
I am sorry anyone has to endure the pain so many of us here experience.
All the best and as above ... happy to chat.