When I said Outback I was thinking of the Red Centre, not coastal Queensland.
Your first problem will be citizenship. Some countries do not allow non-citizens to own land. Hell, some countries don’t believe in private ownership of land, at all!
Second problem: what do you want to do with the land? It could come with all sorts of restrictions that make it worthless. And property taxes could make it LESS than worthless, if you’re just gonna get a helluva bill every year.
Then, of course there are the physical aspects of the land itself. Is it underwater for part of the year? ALL of the year? Is it sitting on top of a radioactive dump? Is it vertical? Is it landlocked?
~VOW
The Australian outback is very valuable land. A lot of that sparsely-populated (not “empty”) arid scrubland (ie not a trackless waste of sand dunes) is sitting on top of vast mineral deposits. It’s also valuable as pasture for livestock. It’s also valuable as national parkland, ie world heritage environments.
The Australian outback is only empty and worthless in American imaginations, in the real world it’s owned, populated, and vital to Australia’s economy. I do not doubt that there’s plenty of land in the US available for far less than any land in Australia.