One thing I am interested in knowing more about is a form you fill in to give to your pay clerk to reduce the amount of tax taken out of your pay when you have a IP. What is this form called? Do you get it from the ATO? Is it a recommended strategy??
It's called a PAYG Income Tax witholding variation form. http://www.ato.gov.au/individuals/content.asp?doc=/content/00096541.htm
Instead of you paying more tax than you need to and getting back at the end of the year the form allows you to pay less to start with and not get much of a refund.
While it improves cashflow and there is a slight gain (due to the time value of money), it's no magic bullet and you'll end up paying the same amount of tax whether you do one or not.
If your cash buffer and/or income is so marginal that you need to do a tax variation to meet the property's outgoings then this may indicate you may be over-extending and may be forced ot sell up if you lose your job and/or interest rates rise.
Completing a form is not necessarily a bad thing, but be wary of promoters who tout it as a miracle that will help them offload more product to financially marginal 'investors'!