hi si hope u doing good ……..the system will not let u apply visa unless its 2 years. yes u can be prepared . scan your and wife driving licences , passports, salary slips lease agreement utility bills, job contract , notice of assessments, group certificate, super aunation statement , bank statement . get all these docs ready and also form 80 for ur and wife, start doing all these docs so whenever you apply visa upload docs .
with the AFP Australian federal police check upload after you have submit application around 6 months as they have only one year validity .
good luck