The PT is the easiest, cheapest way to get started in catsailing in NZ - far more plentiful and far less expensive than an H16. You will find them easily enough on trademe. The thing you miss out on is a trapeze, but if you enjoy the PT, you could move on to an older A class later (or if you're lucky and want to sail with someone else find a Tiger Shark or an old Tornado, both of which turn up occasionally). Others here can speak with more experience and authority about the weight carrying ability of the PT, but they do have reasonable hull volume.

http://www.papertigercatamaran.org/