I don't think too many men would want to live under one roof with more than one woman.
Maybe there are some men who imagine having multiple sex partners but if that's the case it makes no sense to get married at all.
In fact those people who cheat usually aren't looking to replace one relationship with another. They either want to complement what they already have or feel is missing with their spouse or they simply love the thrill of being with someone (new) or desire to escape from their "norm". One of the key aspects of marriage is establishing stability.
If a man needs to be with someone new for "variety's sake" I would imagine being married to 10 women still would not be enough for that type of man. At some point he'd want someone (new).
People with incessant behavior always get bored standing still.
However according to the bible: 1 Kings 11:3
King Solomon had (700 wives and 300 concubines).
My guess is even the most insatiable person wouldn't want that!
For the sake of equality it would be interesting to know if there women who wish they could have multiple husbands!
My guess is you wouldn't find many takers there either. :)