Off the top of my head:
Aircon: case of beer
Form-Ply, Casters Screws etc etc $30
Esky $50
Skin fitting, pvc, valves etc $30
Pump $65
Poly tube for fermenter $10
2x STC1000 25$ (a local bloke was selling a pair on eBay)
The contactor, wiring and other bits and pieces I already had.
Having...