If you live, it's actually quite different. The cheapest Australia has more than 20 Australian dollars of backpackers, but the environment is definitely not so good, depending on your requirements.
The aspect of eating is also 10 Australian dollars. In fact, it is also convenient to join a group if you go alone. It's more troublesome and uneconomical to go by yourself.
Besides, don't bring food to Australia. When you go through the customs, it will be checked and confiscated. If you don't indicate on the declaration form that you brought food, you may be fined.