How much money should I take to travel to melbourne?

I'm planning to go to melbourne in 3 years time when I reach 18 yrs. I'm planning to travel to melbourne by air, then stay one night in melbourne, rent a car then drive to a town about 35km from the city. I plan to stay there for 2 weeks, around April. How much money should I save up for, including car hire, accommodation and flight costs? Thanks if you answer.How much money should I take to travel to melbourne?Sorry kiddo but nobody can predict how much things will cost in 3 years time. How about you just start saving your pennies now and when you are an adult then you can travel to Melbourne when your budget allows.