Certainly some food for thought, thank you guys for all of your advice. That spider though... ****
If you think 2-3 trips a year are required then it is too far IMO. I would rather set an expectation of once every 2-3 years, and once a year if you are determined.
You have to factor in:
The length of flight, even a 1 week trip doesn't make any sense, you want to go for 2 minimum really. Now think how much fre time, vacation time you have. Will every vacation day be spent flying back home to see family, or will you want to explore Oz?
Jet lag, again this tend to rule out a 1 week trip and even makes a2 week trip fairly tiring
The Cost of flights. Seriously, couple of people (+ kids?) several times a year will eat up most of your disposable capital
It is a red flag, if you /your wife feel like they need to make 1-3 trips home a year then probably the psychological distance will be too great. If you end up missing friends and family so much you have to go home every 4 months then you wont last. You have to get into a mindset =that you wont see family or friends much and will be making new friends. over there. The old future back home you will hope to stay in contact with and catch up in the future if you return.