Is the wealthy husband obligated to pay for his wife's Hajj if she does not possess the means for it?

The husband is not religiously obligated to cover his wife's Hajj expenses, even if he is wealthy, as this falls under the category of good deeds. She is not obligated to perform Hajj due to her inability to afford its expenses. What the husband must provide for his wife during her Hajj journey is the equivalent of her living expenses while she is at home.