Permanent / semi permanent houses are actually in a few places in Victoria. Budj Bim was so massive the term "industry" has been applied. This was literally a major industry not only farming, but smoke preserving and trading eels. This was commerce. Same deal with the quarries at Mount William. Seasonal, yes, but that was because the Kulin means of resource management was to keep in motion so as not to deplete, also moving with the seasons. Pretty much base camps that would be returned to in a certain pattern, permanent buildings, but semi-permanent habitation. If that makes sense.