Growing wheat and grinding it out into flour isn’t something I’ve ever heard anyone take on as a hobby before. Having all that actually cost less (including time) than buying bread would be a huge achievement!
Adam Ragusea actually just did a 2 part video on growing his own bread from scratch in his backyard. Part 2 just came out a few hours ago.
Spoiler :P it definitely took way more time an effort than buying flour from the store and making bread. And the final product was a pretty poor loaf of bread because he couldn't find a way to buy the same type of wheat most farms use and had to settle for "animal feed" quality seeds.
I imagine the guy who built his own toaster from scratch probably also contemplating rebuilding the entire pipeline to produce the input to the toast. "Step one: acquire the ore. Step two: smelting iron ore..." http://www.thetoasterproject.org/page2.htm
