I do the renos but i hold the place after i reno it. Basically, buy the worst house in a good street, or buy a house that you see something special in (and that you can get a good deal on), then carefully renovate it and increase its value. The you get it revalued and then you rent it out.
Don't go and sell it as the various fees and taxes will eat your profit.
But if you buy and reno and hold, you increase the value, get more equity and you make your profit from the increased equity (and also the increase in rent that you'll most likely get).
One example (which i have just done), is buy 35 year old house with original kitchen, bathroom and carpet. Pull out the kitchen, stick a Bunnings Flatpack kitchen in, new tiles on kitchn floor, put new tiles in the bathroom, stick a skylight n the bathroom, new amenities in the bathroom, rip the carpet out, sand and polish the floorboards underneath, new curtains from Spotlight, new powerpoints and light sockets everywhere, stick an alarm in. Then get it revalued. You may have increased the value (and your equity) by at least 30k-40k by doing the above. But i repeat, don't sell it. Hold it and rent it out.
You do have to be prepared to either live in it while you are doing a reno (not recommended if you have a family), or have the cashflow to cover the mortgage on this new place (and your existing PPOR) while you are doing the reno on it though.
Thanks
g