So do the oil, filters and check the brakes and other stuff yourself. Then go somewhere (a tuner) with a dyno and check the base timing, boost levels etc. Would be much cheaper if you have the time.
I'm from interstate and haven't needed a tuner yet. I was told to go to EFI Performance http://www.efiperformance.com.au. Other then EFI, Yatala Headworx http://www.mechanicalrepairsbeenleigh.communityguide.com.au/ is near my work. So I'd consider them also.