Howdy again crew

BIAB #2 went into the cube today (a Little Creatures sort of Ale), which gets the mind focussing on #3.... I was thinking a single-hop, all-Australian Ale; no imported ingredients. So the recipe I have been playing with on the Calculator looks like this....

22 litres into fermenter @ 1.050
Mashed 90 min @ 65-ish
90 min boil
30-ish IBU
Ferment with a re-cultured yeast from a few Coopers Sparkling (anyone know of a locally produced yeast?)

4700 g Joe White Traditional Malt
500g Joe White Wheat
300g Joe White Caramalt
10g Galaxy [13.4% AA] (60 min) - 12.9 IBU
20g Galaxy [13.4% AA] (15 min) - 12.8 IBU
15g Galaxy [13.4% AA] (5 min) - 3.9 IBU
15g Galaxy [13.4% AA] (flame-out or dry-hop) - 0 IBU

Anyone see any problems hereabouts? I know the boiling hops is a smallish quantity, but the end result is still nearly 30 IBU.... All advice very much appreciated.