Obviously not being in that situation, but all I could think of if it was 10 days, was to ditch the ■■■■■■ shopping bag for starters. Get a map and do a bit of a walking tour around melbourne, there's a heap of stuff to do, go to the library and read a book! Steal a bike and take it to cash converters! Do an eat and run from a supermarket or top class restaurant. Obviously this relates to the show and life on the streets would be much tougher.
I hadn't heard of any of the 'contestants' previously, and it looked like a lot of free publicity to me.