Kids welfare means supporting Dad to detox

I think you probably need to work out a way to give very boundaried support. I would not be using savings though as a PP pointed out you may well be a single parent in the future and may need that money if anything happens to you.

It is a difficult balance but I think you can 'be there' for them, signposting and supporting but without extending yourself. How would you feel if you spend all your savings on paying for accommodation and then they relapse again (which is sadly very likely)?

Protect your resources and ability to take care of your child in the longer term. If the worse happens and they do lose their dad (despite all and any support you can give right now) you may well need time/energy/money to support them.

I say this as someone who is currently very unwell, probably as a consequence of carer 'burnout' from trying to support someone beyond what I now realise I was capable of.

Everyone here hates men with a passion and will tell you to leave them as soon as they stub their toe and do a swear.

Yes this man needs help and support to deal with the illness he is suffering from. If you replace alcoholic with cancer, see if it changes your mind.

My father died from alcoholism when I was 15. It has been a scar that has never left me as a person. Do what you can, within legitimate self preservation of keeping yourself safe, to get him all the help you can.

You're a family, you made a pledge and promise to help and support each other come what may. This is the help and support he need. Ignore the haters.

I also have alcoholics in my family, only one still living. I would say hold onto your savings. The likelihood is that you will be solely responsible for financially supporting your DC. Do what you can to help him access the support, but not with your own funds.

I wouldn't do it. This is going to sound harsh but, as a daughter of an alcoholic father and a mother who spent 11 years turning out lives upside down so that we can have a "alive and well dad", I can say that a dead father is OK. Mine's been dead for quite a few decades and I stopped speaking to him a decade earlier anyway. And I am still a bit pissed with my mum for not leaving him to it earlier. I understand her dilemma from the wisdom of my age now but I certainly can't entirely move on from what she put us through as children.
Your husband is with his friends and family now, why can't he access recovery services where he is? How long are you planning to accommodate him and what will happen if he relapses again?

Back to basics:

You did not cause this
You cannot control this
You cannot cure this

But of course for the sake of your shared DC, you want him to survive this. What exactly would be involved if you took responsibility for him having a roof over his head (presumably conditional on him accessing support services)? What's likely to happen if you don't?

I have had a few alcoholics in my family, including my dbro and mum who died young as a result.

Whilst it's true that it isn't your responsibility to look after an addict, I also see your point that it is in your dc's best interests not to have an addict for a parent or a dead parent.

I would do it temporarily if I could afford to without your dc missing out on things because you have to pay his rent. But I'd have a clear cut off point. I also feel a bit sorry for the landlord you might be inflicting him on, but I get that wouldn't be a priority

This is a tricky one - sounds like you’ve been through the mill. It is his responsibility to sort himself out, but when my ex-DH had a mental health crisis after we separated, I did look after him for the very reason I felt it was better the kids had a reasonably stable (and also alive) dad. It didn’t involve financial outlay, though.

Are you in a position to support him in this way?

Your priority is your child. You can't help an addict , only they can help themselves. Let him figure out how to get himself help and be there for his child.