If I were trying to eat that diet and not break the bank/use all my time I'd invest in 4 things: 1) A ricecooker. 2) A food processor. 3) A sous-vide/vaccum sealer. 4) A Costco membership.

The ricecooker makes rice and keeps it warm all day. The food processor makes quick work of chopping veggies.

You could pack the cod/chicken in vacuum bags and freeze it, and then pop it in the water bath when it's time to eat. The sous-vide means you're not worried about over-cooking/attending to the process so you can do other things while your food cooks.

Costco will sell you high quality cod and chicken at ~$10/lb (probably less in store) and steak around $20/lb. You could similarly buy rice/potatoes/fish oil there in bulk.

Admittedly you're still spending $50+ on food/day, but that's not out of the question for someone earning $150k/year.

That said, it is probably much easier when you're earning $150m/year and can afford a private chef.