Which is better for my wife: that her husband smokes shisha at home, so he doesn't spend money, or that he smokes it in cafes?

The husband should be gently advised to quit smoking shisha, which is forbidden, whether at home or in a café. Smoking shisha at home, where no one sees him and no one is harmed by it, is less damaging than openly doing it in a café, but this does not mean preferring one over the other. The criterion for preference should not be financial scarcity; rather, there must be fear for the husband from God's punishment and eagerness for him to abandon the reprehensible act.