How many years must it take for Australian parents to reunite and immigrate successfully?

Hello, application conditions and time limit for reunion in Australia:

Guarantor:

Australian citizen, permanent resident or eligible New Zealand citizen.

18 years old or above

No crime

Guarantor:

Spouse:

309/820 visa

At least 18 years old

Legally registered marriage with the guarantor, or satisfied the de facto marriage for more than 12 months.

Meet the medical examination requirements

No crime

300 visa

At least 18 years old

The applicant must be of the opposite sex, and homosexuality is not allowed in this application.

Plan to marry the guarantor within 9 months.

Meet the medical examination requirements

No crime

Parents:

173/ 143 visa

The child has legally lived in Australia for at least two years.

At least half of the children live in Australia permanently.

Pay an extra high application fee to speed up the trial.

children

10 1/802 visa

The guarantor's biological children

single

/kloc-under 0/8 years old

/kloc-those over 0/8 years old who are studying full-time or unable to work due to disability.

445 visa

Parents hold 309/820/445 visas.

single

/kloc-under 0/8 years old

/kloc-those over 0/8 years old who are studying full-time or unable to work due to disability.