Andy George, who runs the ‘How to Make Everything’ channel on YouTube decided to do just that. He made his own sandwich from scratch and it took him 6 months and cost over $1500 to make it.
He grew his own vegetables and wheat, even made his own salt from the ocean water (which did get him into trouble with authorities), milked a cow to make cheese and butter, collected honey on his own and finally killed a chicken for his sandwich.