If you spend just 1 hour per week on purchase and preparation (and you likely spend two or three), you need to add your hourly rate (or the value you assigned to a loat hour of hobby, unless making these meals is your hobby)

It is not easy to account for "time spent doing X", but assigning $0 to eat is most definitely wrong.

If you do the components+time math properly, it is likely soylent and even McDonalds is cheaper. It is only when you add "enjoying food" and "future health" that you may (or may not) win against them.