Excellent, looks like you are after some savings ideas. Let’s start with flights. To date, my advice is to utilise skyscanner for your flights. They compare a large amount of air lines and regardless of the country, there always seems to be flights and a the right price.
https://www.skyscanner.com.au
Accommodation will vary depending on your needs but do not look past airBnB for great places with houses and units big enough to fit your entire crew.
https://www.airbnb.com.au/
The following discounts have been offered to our members to make it even easier to take the trip.
Here are some more. Enjoy!