Polygamy is a normal form of marriage. It’s a good thing compared to “homo marriage”.
I vote neither of the above.
No, it's not. It creates a system of haves and have-nots. If that's the norm in a society, some men will have lots of wives and many others will not have one at all. Because of the nature of the genders, a woman marrying multiple husbands would be as rare as homosexuality is.
It would also seem likely that the children would be spending disproportionate time with the mother as compared to the father. Not to mention each wife would not be able to receive the same amount of attention from the husband as they would in a monogamous relationship. It doesn't sound like a healthy model at all. Sure you can find examples where everyone in such a relationship says it's okay, but you can find homosexuals who say the same thing. Even if it works in some odd cases, that doesn't mean it's the right model for society.