Before you even consider buying Go For A Lesson!!! Seriously it will get you up and running quickly and it will get you out so you can see what sizes of kites are actually being used. Rather spend the couple of hundred on a lesson than R12000 on a new wrong kite. I got my first kite 2nd hand, a 12m and although it is good for inland which is where I intended it for, as soon as I got out to the coast I was way overpowered (I weigh 70). Also when I was learning I decided that as I came from a watersports background (wakeboarding and waterskiing) I could pick it up quickly. It took me forever to get the waterstarts going and then I was completely out of control. So I went for a lesson and I was getting upwind in one afternoon. It does help to have that little bit of experience showing you how to do it. And its a lot safer. So, depending on where you currently are maybe try and squeeze in some lessons before you leave and as I don't know of any shops down in Plett. Here are some good places: Cape Town: try Cabrinha www.cabrinha.co.za/
or Constantly Kiting www.constantlykiting.com/;
Joburg try: Inland Kitesurfing http://www.adsports.co.za/
or Durban: Ocean 2 Air www.ocean2air.co.za/
. Otherwise just search around for a place but seriously consider lessons (You can ask your instructor more about the kit when you are having the lesson).