HI wdwgfh,
How are you? I understand your concerns obviously. The things with alcohol problems is that every single person is different. There isn't a 'typical' alcoholic'. What I would say though, is that it's great that he's showing initiative and doing this himself, however I'd be worried that it will be really hard to maintain it. For me, drinking wasn't just the physical addiction, it was the emotional reasons and my inability to cope with life on life's terms that kept taking me back. Most problem drinkers will relapse if they don't have ongoing support, and very few are able to give up totally on their own without some form of support. Some, but very few.
I go to AA even though I haven't drank in quite some time because I need to keep addressing the issues that I would have drank on. It's quite a complex problem and never as simple as just giving it up, as much as we'd like to believe it. I do a 12 step programme, because it helps me to cope with life on life's terms, something I was unable to do before.
Obviously I can only speak for myself and what I've seen around me, but it's so much easier when you have outside ongoing support. This is a difficult one for you, obviously - and I guess ultimately - you must your your knowledge and judgement in this situation. Personally, I wouldn't forge ahead too quickly thinking he'll be 'cured'. None of us are. I guess the only advice I can give to you is bide your time, look after yourself and your family. Don't rush into any huge changes and make sure that he continues to prove himself to you. Most problem drinkers go through a kinda journey of self-discovery, which unfortunately can involve lapsing and relapsing. Protect yourself first and foremost. Get to Al-Anon and make sure your needs are met and you are supported.
Don't get me wrong, I'm not writing your DH off, I'd just be careful not to put all your eggs on one basket just yet. You're right to be cautious. You're more than welcome on the thread anytime! No-one's gatecrashing, if we can help in any way, we certainly will try.
I wish you and your family well.