Hey Knut,
There is little point in coming to Perth, our season has all but ended. We are about to enter the doldrums of no wind for the next 8 weeks until the storms start brewing and we start getting belted by the W/NW frontal winds.
Pretty tragic time to visit WA unless you go way up north. Up North of Carnarvon you may get some wind. Not much swell around here either until June. Seeing as you are on the east coast, Id stay there and head up North to Cairns where you will get wind.
Besides, Euros have no concept of how far the drive is from Sydney to Carnarvon LOL. It's a quick 5,000km of nothingness. From Cairns it's roughly a short 7,000km jaunt.

Come back and enjoy WA in October, then you'll get the best waves and wind of your life, everyday!
We sell Core Kites over here in Perth and I think you'll be surrprised how many you see on the waters around Perth. Great kites!
Good travels,