I have $350,000 in super and thinking of using to fund a property development in Brisbane where I can buy the property, move the existing Queenslander to own side and create space for two townhouses. The sale price is around $800,000 and I will need about $500,000 to build. I’m 53, not married, no kids and earn $180k a year. Own my own home and have an unencumbered investment property valued at $600,000. The idea would be to sell the property in Brisbane is 5 years to help fund retirement. Is this a good idea ?