From a sex perspective - yes, of course. But, you don't get married for sex.
Also, what about a wife with a career? She would make her own money and spend it as she sees fit, once the needs of the home (money wise) are met. So, it ends up being cheaper than going to a prostitute, when you have a working wife.
This idea of a man "taking care" of his woman is long gone. Women need to work today.
And yes, if a man has a house wife, it will be far more expensive than just shelling out $200 for having sex with a whore - since you have to pay for all the personal expenses generated by said house wife.
Also, even if I end up making $1M a year, my wife/GF will work - 20 hours at least, part time, somewhere doing something. Sitting on your ass all day, while a nanny cooks/cleans/watches the children is unacceptable. Unless she handles the housework herself,... but, it would be up to her to decide if she wants to be a house wife or a part timer/ full timer with a nanny.