First Home Buyers

We have $ 80,000 as a deposit. But my husband and I have 3 boys and my father lives with us. We currently rent at Bondi Junction and the means to pay $ 4,000 per month for a mortgage. We disheartned to find, even in Botany where we are looking, places are very, very small. We are all first-time homebuyers, but most of the properties we would look more than $ 600,000. Would it be wiser to purchase a unit in a well, put my father in him for 6 months to ensure that our rent and mortgage for the unit are not more than $ 4,000 per month, it does not place quickly, sell it and try to do a little more money for more space, while taking full advantage of first home buyers and no stamp duty? Or is it too risky and we should just squeeze into a small house?
Thank you!

Do not live beyond your means, Murphy will be knocking on your door if you do, move to an area you can afford and never give up the space, a note for the duration of time is a cast of Cross that one can lose a grip on accident etc. In considering a duplex and renovate it.

Do not expect much appreciation on a house in 6 months. It generally costs 8-10% to sell a house, it has to appreciate that the foregoing, to make it worthwhile even to try.

Get the most you can afford and wait a year or two and then sell and move up.