I agree with your assessment, but I've also found that Brisbane's holding costs are significantly higher.
* Investors are charged higher council rates by the Brisbane City Council.
* Melbourne's property management fees are often around 6%-7%, Brisbane starts at 8%.
* If you don't have a 'water wise' certificate for a Brisbane property, you can end up paying for a significant portion of their water usage (not just the supply).
Throw in higher insurance costs as well.