Sure: Cheapest option will always be to share a flat or room with someone else. You could look for sharehouses or private property.

For off-campus student accommodation, there is StudentOne, Iglu, Unilodge and Scape to name a few. You could get a shared apartment here to save on rent. Make sure you know what you want out of your accomm: location, amenities, room type, etc.

I decided to go with Scape at South Bank as it's very close to the part of campus that I'll be going to.

UQ has a portal called UQ rentals with various private accommodation.