direct from Sydney to Melbourne is a straight road called the Hume Highway approx 875 km ( nowhere to kite here )
along the coast from Sydney to Melbourne approx 1300 km ( lots of places to kite here ) Merimbula is one ( if it is windy and there is a beach you can kite )
12m is ok up untill about 27knots so if the wind is under that..... a 12m is fine. 95% of the time it will be under that
explore and you will find great places to kite.... use common sense and you will kite in the right places with the correct kite.
enjoy