Robbo,
That sounds good.
Anything to put variety into the racing.
Maybe the criterium track will be built during that time.
DA submission $5,000
Engineering: Stormwater & structural $10-$15,000.
Concrete: allow $90/m2 for excavation & concrete. I don't know the dimenions but 1km long x 3m wide = $270,000
Drainage
Lighting
Long service levy
CC fees
If you need help in any of the criterium work let me know.