Katie,
I wish you the very best but I do not believe this is a good idea AT ALL.
I do not think it is fair to ask anyone to be your alcohol police, but especially not a significant other. This is not fair to him or your relationship, in my opinion.
So, let's say you do this and then...what?
If you stay sober because you are being policed, what does that prove?
Is he going to be expected to be your policeman forever? Or just 30 days? What happens at 30 days? Are you cured, don't need a policeman, he leaves and all is good? I just do not see how this is supposed to work?
If you are not done, you are not done, IMO.
And if you want to drink and actually do not because he is there, that could start a resentment on your side or you could do what I used to do when I wanted to drink and my husband was around. I would just start a fight to get him to leave possibly and give me an excuse to drink.
Ok, maybe I am now rambling, but these are my thoughts on your question....