Paul,
My recommended itinerary.
Arrive Tues early am-
36 holes at RM West - stay at Victoria GC
Wed am: play Vic, play The Heath pm
Thurs, 6.30 am small plane flight out of Moorabin, land at 2nd hole Barnbougle Dunes at 7.45, tee off by 8.00am BD x 36 a stay in single cabin at BD, garlic prawns and steak for dinner
Fri: 36 Lost Farm - fly back to Moorabin, if possible, drive down to Mornington Peninsula.
Sat: play St Andrews Beach in am, play National Moonah in pm.
Sun: drive to Tullamarine, fly to Syd, play NSW GC in the late afternoon
Fly home
Whew!
Recommend that you train hard starting now, walking 36 every couple of weeks, more as you get closer, get fit. This will ensure that you are in physical shape to make the most of such a big trip.
Pay more to fly and shorten your travel as much as possible, and avoid long drives, life is too short.
Get your wife to then fly out for 5 days, and sight see for the following week.