I don't want to be a downer but I'm going to say it as I see it. Presuming you are serious.
First a 19ft trailer sailer is not at all suitable for a trip to Antartica. A trip to Antartica includes sailing to the deepest depths of the southern ocean. You are going to encounter gales up to force 12s, ice, icebergs, snow, extreme cold.
What at will you do about food? Weight? Water? Cold? Rim ice? What will happen if you hit ice. A trailer sailer will rip clean open with impact. Weight anymore than maybe 200 kg will be to much for a trailer sailer. What if the centreboard breaks?
lisa Blair was de-masted in an overrigged Open 50 ocean racer. Jon sanders hit a force 12 gale in the southern ocean, you will need to pass through this area to get to Antartica. He was also knocked down over a dozen times. He was using a very well prepared brand new S&S 34 which are specially designed for this kind of pounding.
Trailer sailers are designed for day sails, or weekenders. With planning your could go on an adventure with one. A trip maybe from Sydney to the Whitsundays and back that would be a nice adventure. A trailer sailer could definitely do this.
Simon Carter does fantastic videos on his trips up the east coast. He has recently done a trip in a Noelex 30. His old videos have him do it in a spacesailer 20.
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If you are content on a voyage like this one, have a look at skip Novak's boat. It is set up for Antartica.
Regards,
Mick