Hi waldo1 and makingmoneystill
Sounds to me like you have both done very well for yourselves. That's great news. I love to hear about the younger generation making money. I'm well retired now and with the relevant experience of a real estate developer and RE agency principal, my investment "opinion" to you both is this: With the exception of WA and NT (Darwin) I would be very wary of buying any RE at this point in time. I'd say that we have reached the top of the RE cycle in Oz and its a good time to sell or hold, if you're not overleveraged (nothing beats quality RE in the long term). That said, you've got to be prepared to continually change your investment strategy according to the economic and market conditions. A process you both seemed to have mastered

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As for me, I've just spent the last three years (12 hours per day x 7 days a week) studying the disruptive technology of lithium and battery storage, including electric vehicles. I strongly recommend that you both investigate this space, given Australia is set to be one of the biggest players in lithium, as are our Australian near term producers. I still hold (unencumbered) RE as the mainstay of my diversified investment portfolio, but I see the above space as a viable
filler while the RE market is arguably in plateau mode with high risk potential. In conclusion, with respect to RE, ask yourselves, why are most property developers in Melbourne and Sydney (and the world at large) are installing integrated, electric vehicle charging stations in their new property developments?
Opinion only and not meant to be investment advice.