Personally I wouldn't, I was married almost 25 years then single for 7, met a lady and head over heels in Love, she knew I was in recovery yet within a couple of months she drank every night, took her to a Detox program I swear by, started drinking two weeks out, I was really torn then on a trip to Cuba it was more than I could handle and I relapsed, I left her after that and I did explain kindly why yet she continued to contact me for months, her two adult children stood behind me saying her drinking was always a concern to them.
Skip forward to today I have 18 months with a lady of my dreams and she doesn't drink, only reason is she doesn't like the taste, we have done more activities and trips in 18 months than my 24 years 11 months of marriage, never fight or argue and support each other every day.
In your shoes knowing the very little I do......I would keep looking as the risk is simply too high unless he has a long period of sobriety.
Andrew