All the family members have emigrated.

The whole process will be very long and needs to be carried out in multiple stages. First, you need to move there, and then you need to meet all the requirements of the immigration office. You can't consider your parents until you get PR, and it depends on the policies of that period. The policy on parents' immigration seems complicated, including how many children they have, whether most of them are Australian residents and so on. I feel that the whole process should take many years. At that time, it was not clear what the policy would be. Australia has just adjusted its immigration policy this year, and it is hard to say what changes will be made in the future. However, if you have this plan, you have to do it step by step. First of all, you have to see which way you plan to immigrate. If it is a skilled immigrant, it may be faster. If you are an investment immigrant, the whole process will take at least 3-5 years to consider your parents.