flipping ppor in a rising market?, page-22

Technically flipping is incorrect. The term flipping comes form USA and refers to buying and selling properties in short time. The transaction costs and taxs in Aus make this strategy useless. Selling your PPOR to rent and wait for the market to fall is theoretically ok.
But the falls have to be large to cover the, costs of selling and buying, rent and tax on earnings. There is nothing wrong with selling your PPOR if you do not want it and decide to rent in certain cases. Renting in an area to check it out or having money on hand to buy at Auction etc.

Three of my existing properties are ex PPOR that I have moved on from and now rentals. Why sell at a peak. a far better strategy is to never pay your PPOR off. Borrow to buy it and set up an offset account with 75% of your funds sitting in it. If prices peak do not sell. Go to the bank and get it revalued and refinance another offset amount.
When comes time to move on you can take funds from offset and or use those funds elsewhere. Not a strategy for everyone and need good accountant to ensure tax is correct.
The big killer in property trading are the huge costs to state and fed governments. Stuff them the longer they have to wait and the less they get the better.