To play devil's advocate, if you factor in the cost of your time, I would expect home cooking to be extremely expensive for most of the people posting here.
20 minute mental break to prepare some food is a great way to keep energized for more work.
A game changer for me has been a high quality rice cooker. Put rice or quinoa in the cooker as soon as I wake up and my at my “lunch break” I prepare some other stuff, eat and get back to work. I work from home all day generally.
