i went for 6 months and took around $4000, but i also worked for a month on a farm so I earned and saved quite a bit! $5000 should be enough but it all depends on how much you want to do and how good you are with money (I'm terrible with money) hope this helps .

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Australia Travel Forum
Australia Travel Talk

This is really good that you travelled in Australia for six month and earn some good money for your trip as well. I think $5000 is big amount but for six to seven month this should be necessary.

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