The economics of home baking

I buy organic flour for my bread. I figure if I'm baking it should be the healthiest bread I can manage. Organic flour is cheapest when you buy in bulk. That's easily done by finding a local bulk food shop. They're all over the place but rarely advertise so you have to go searching.Here I can buy a 5kg bag of Kialla Pure organic flour - either wholemeal, rye or white for around $10. It's cheaper