You have a $20,000 AUD budget, you need to go to all of these places:

EIFFEL TOWER, Paris
THE COLOSSEUM, Rome
STATUE OF LIBERTY, New York City
THE ACROPOLIS, Athens
THE TAJ MAHAL, India
PYRAMIDS OF GIZA, Egypt
GREAT WALL OF CHINA, China
GRAND CANYON, USA
PETREA, Jordan
SYDNEY OPERA HOUSE, Sydney
MOUNT KILIMANJARO, Tanzania
THE LOURVE, Paris

You are staying at each place for three nights.
You must include the price of hotels and the price of flights.

To visit all these places within a $20,000 AUD budget, I suggest the following itinerary, including flight and hotel costs. All prices are approximate and may vary depending on the specific travel dates and hotel availability. Prices may also be subject to change.

Starting point: Sydney, Australia

1. Sydney to Paris, France: $1,500 (Economy Class Flight)
- Hotel in Paris (3 nights): $450
- Visiting the Eiffel Tower & The Louvre

2. Paris to Rome, Italy: $100 (Budget Airline Flight)
- Hotel in Rome (3 nights): $300
- Visiting the Colosseum

3. Rome to Athens, Greece: $100 (Budget Airline Flight)
- Hotel in Athens (3 nights): $300
- Visiting The Acropolis

4. Athens to Cairo, Egypt: $200 (Economy Class Flight)
- Hotel in Cairo (3 nights): $250
- Visiting the Pyramids of Giza

5. Cairo to New Delhi, India: $300 (Economy Class Flight)
- Hotel in Agra (3 nights): $210
- Visiting the Taj Mahal (by train or taxi to Agra)

6. New Delhi to Beijing, China: $400 (Economy Class Flight)
- Hotel in Beijing (3 nights): $300
- Visiting the Great Wall of China

7. Beijing to Amman, Jordan: $400 (Economy Class Flight)
- Hotel in Amman (3 nights): $270
- Visiting Petra (by organized tour or rental car)

8. Amman to Kilimanjaro, Tanzania: $600 (Economy Class Flight)
- Hotel in Moshi (3 nights): $220
- Visiting Mount Kilimanjaro National Park (short hike or specific tour)

9. Kilimanjaro to New York City, USA: $1,400 (Economy Class Flight)
- Hotel in NYC (3 nights): $750
- Visiting the Statue of Liberty & Grand Canyon (organize a separate flight to Las Vegas or Phoenix and book a tour)

10. New York City to Sydney: $1,200 (Economy Class Flight)
- Visiting the Sydney Opera House (no hotel cost as Sydney is the starting point)

Total approximate cost: $17,200 AUD (prices may vary, and additional expenses such as meals, transportation and attraction fees are not included)

This leaves you with approximately $2,800 AUD as a buffer for additional costs such as meals, transportation within cities, and entrance fees to attractions. Also, keep in mind spending might fluctuate based on your preferences for accommodations and flights.