from wikipedia
In 2008, the AFL increased the international rookie list for clubs to eight per year and a total of up to twenty four players at any one time. Scholarship costs were also reduced from A$10,000 to $1,000 for players who remain in their country of origin during their development and $20,000 for players who are moved (such as to Australia) to continue their development.[5]
you could field a team of international rookies it seems.