No problem
This won't be an issue - you'll have eff all chance of getting a basing in Oz if you join as an SO now anyway.
Due to a combination of:
1. DEFO recruits filling slots
2. Current senior HK FOs scrambling to get the few slots still available in the next few years
3. Based Captain extendees (RA 65), AND
4. FOs already in situ knocking back command course to remain in Oz
All of this will almost certainly mean there is NO chance of ever being based back home for Aussies joining as SOs now. Commuting isn't really an option as an SO due exchange rate right now and as an FO in HK your roster will pretty much preclude it too.
Sorry to be the bearer of bad news but them's the facts.