I think the car a 80% cheaper than HK, The parking space in HK cost $3000 per month. The car park easily cost over 1 million HKD.
Gas around $15 ($2.8 AUD)per liter. I can get a Toyota Kluger (Jeep) for $43000. I think HK cost at least $400,000 for it.
Coles cookier around $2.5 AUD per dozen. HK Mrs field is selling $14 HKD (around $2.8) per pieces. 1 whole chicken cost $8 AUD. Food I will say 50% cheaper than Hong Kong.