Conditionally, yes I would and a lot of it hinges on the first corollary, that everyone is a willing participant and wants to be there. It works out like the old days, less than five generations ago, where a man can have many wives (at least in my own culture, I reckon Occidental cultures have been monogamous for far longer). If they are willing to put in the effort of being a happy extended family, I would be content. Wish fulfillment aside, it was the way things worked for a long time and sure, having the love of multiple people would be a great thing. Yes it would be exhausting but in the end I think it would be worth it.