Sorry, I was not clear in my original post. I meant we could rent an apt. or buy a house. Since buying is a big purchase, I was uncertain if that would be a mistake since he is new to sobriety. Maybe it is better to give it a year and rent and see what happens? Like Anvil said if he relapses it won't be because of where we live, but it will make a difference in how difficult it is to get out of the situation.
Thank you for all the advice, I can see the one I can afford on my own is the best.