Yeah I figured out you were in Victoria. I'm from Sydney. Expect a possible phone call from the interested party. No idea about rice, which I've only ever seen planted in fields, but a close friend of the investor is a qualified biologist and a cursory web search suggests that rice hulls are themselves an appropriate hydroponic medium for some crops, so perhaps you could potentially save further on transport by going multi-crop and full circle by re-using waste product as growing medium for other crops. Try Rice endosperm iron biofortification by targeted and synergistic action of nicotianamine synthase and ferritin, Plant Biotechnology Journal, 2009 (7), p. 631-644, Wirth et al