If you´re going to be sharing a room (short term rental are much more expensive)
200$ per week in rental, 100$pw supermarket, 20-30$ per meal outside home, 20-40$ pw in public transport.
Minimum wage I think is 17$/hour but I think you´re safe to expect at least 20$/h for unqualified jobs. If you're on a students visa or work holiday visa you can work max 20h pw so that's 400$. It's doable. There are tons of people on those visas around here and they even save money.