I thought I would chip in here boink, with my thoughts on cruising in a Thruster. I have a T500 with a Rotax 582 2-stroke engine. The Thrusters, generally, are not a comfortable aircraft to be sitting in for any length of time - say 2 hours absolute maximum between breaks; you'll be landing to refuel anyway after 2 hours or so. And at a cruise speed of 50 - 55kts you will be doing some long constant hours in the saddle if you need to traverse this continent from West to East - just reading between the lines in your post and assuming stuff here, so don't shoot me if my assumptions are wrong eh. Also, I expect it will take more than a day or 2 to familiarise yourself with flying a Thruster - completely different to the Gazelle, let me tell you!! I really like flying the Thruster, and intend doing a few longer flights, but they are not really a cruising machine - more a fun fly machine. I reckon you would be better to 'trailer' a Thruster for a coupla thousand kilometres, especially if you only have very low hours on type.
Anyway, I hope this helps.
Pud
PS. It would be a great adventure to fly a T500 across Australia..... Hmmm, I'll have to think about that!!