I would check out this person thoroughly. I know many are probably fine but people who are trying to get sober are vulnerable and sadly there are some who take advantage of this. I was urged against my better wishes by my therapist to hire someone, (and I was not having any difficulty), his fee was north of $5k/month. I bailed after a few sessions, and although I asked him to charge me he didn't. Not sure what your husband may need, and I am sure I got a ridiculous price, but if you think about it newly sober people and their loved ones can be willing to try anything. The guy I worked with had a very formal contract, one that protected both of us.
Screen this person, inviting a stranger to live with you is always a big step, I would want to know exactly who I was inviting to move in…..