Hi there
well you will be arriving at the begining of winter, not cold at all, between 10 -20 degrees c, seldom cold. Take rain coats as it is the rain season and it can rain for days. Between you bunch I would suggest you buy a car there, a rust bucket(A cheep car less than a 1000 pounds) as you will find it to be a quite town and you will want to go to PE and down to Plet where it all happens over weekends.
As for the flying its good and they have a large fleet of aircraft, You realise you will be doing an ICAO licence and not a JAR licence, which means you will have to write 2 CPL AND 2 IR tests in order to get the JAR licence.
You will have lots of fun there, beer is cheep about R6.00 (60 UK cents)
Close to the beach and the water is nice and warm, fishing is good and playing golf is cheap.
Go have fun in the sun