That Calculation tool is very useful. Apparently you don't actually need to be renting or leasing. I filled it in saying I was living with family and friends, a member of a club, intending on staying in the same place for 6 months and that I held most of my assets in Australia (all of which are facts - for once I'm delighted I don't have a car or a savings account in Ireland) I was deemed a resident for tax purposes. I tested it without the 6 months thing and I was not a resident. I'd advise anyone who is unsure to use the calculation link to the ato. Who would've thought it? travellers point - the place for your tax advice, commision free!
Thanks again everyone,