While this is a alternate history map, this map does a good job of depicting an actual proposed plan by the Freeland League of their plan to establish a Jewish homeland in the Kimberly region of Australia.
Proposed in late 1938 or early 1939, the plan was for 75,000 European Jews to occupy 28,000 square kilometres (11,000 sq mi) of agricultural land. Under the plan, an initial 500-600 pioneers would arrive to construct basic necessities for the settlement such as homes, irrigation works, and a power station, followed by the arrival of the main body of immigrants.
Of course, the plan was rejected by the Australian government, who was not very warm to the idea of an alien population making their home in Australia, backed up by fears that the Jews would leave the settlement and into the bigger cities, where they would take jobs away from white Australians.
I have been curious about this scenario for a long time. I wonder how this would've worked out.