I often stop and rental houses. I rented a $ 1500 a month and I'm happy about it. Then I rented a car to until the city and learn more about it. My friend advised me to install a mobile app: https://itunes.apple.com/us/app/car-rentals-market-app/id878633650?ls=1&mt=8
With this mobile app, you can rent a car without any problems all over Sydney and the world.
I am very pleased that downloaded! I wish you a good journey and experience.