I don't know all the details, but I do know that Chaim has sacrificed a great deal for this movement. He's mentioned how he could have gone to law school and avoided prison, etc. I think finding a wife is another example of him puting his personal desires aside, to concentrate on the movement. He may decide at some point that he should look after his personal needs, which is certainly understandable. He is certainly deserving of some personal happiness. There is a conflict here, I think. But only he can decide when it is time.
When he wants to find a wife, he'll certainly be able to do it. So I don't think the problem is finding a wife, rather it is making the decision to change his focus from the movement to raising a family. Personally, I would very much like to see him devote some attention to himself. He is certainly deserving of personal happiness.