You are not going to make $100k on a $350 etc. property, however if you got a bargain (buying is where you make your money!) for above $500 in a fabulous position like on a canal or something, did a fabulous "wow" factor reno and lived in it for a year, you probably would make $100k. Most people buying around the $700 or up mark have no idea of hands on skills and make their money elsewhere and just want to shift into something finished. I found a beauty a couple of years ago at the end of a canal, had really been let go and a terrible waste of space in the floor plan, (I could have fitted in an en suite, wir and study, no kerb appeal, however it went too high at auction for me, and thankfully as the bum fell out of the market within 3 months. The Gold Coast is really down at the moment and has been for about 2 years, so I would not count on CG helping at all as I don't think it will come up for quite a while. Usually first to go down and last to go up. Unless you have tons of money I would keep my day job, start on a cost effective model, thinking to make $30-$50k for the first one, and then move up. If you had a 5 year plan and ploughed the money back in each time, you would do well, however, keep in mind, tax dept may deem you are earning a living doing this, although I believe it is quite legal to buy and live in another house each year.