Is this really the demographic that should be optimized for? Seems there's a nice financial incentive to find a partner and split the cost of rent. As a single childless person myself (who has shared rental houses with a friend for several years now to lower costs of rent and keep it "affordable") I've been led to believe that the cost of having children amortizes (especially as you add more children) with incentives, and really pays off as you get into old age. If it were up to me I'd rather optimize for the family unit rather than singles.