Modeling a hive-mind as a single creature is going to be a lot more expensive point-wise, since the quality assumes that there's more than one of you. What you'll need to do is pick out the benefits of hive-mind that matter and buy them individually. If you want Condition Immunity to the four conditions listed in hive-mind, that's 16 points instead of the 2.
However, there's nothing stopping you from just creating a single massive creature (a mighty anaconda mating ball?) and flavoring it by saying "it's a hive mind swarm" without any significant mechanics to back that label. Up to you.
Or you could create an enormous flying shark with a laser beam on its head. That was my plan B, and I offer it free to any who just can't decide.