This sounds like a good plan to me - but obviously you don't need a qualified chef to shop & prepare this type of food. A cook could do it; actually, almost anyone who can cook & who has some knowledge of nutrition could do it (Like a personal trainer who has taken time off to have kids).
At $45k split between 4 of you i think it's a good deal. I ate this way some years ago while bodybuilding and I know how extremely well prepared you need to be. I'd be tempted to pay someone rather than lose my Sundays preparing food for the week.
I really think this is a great business idea for someone to do on a commercial basis & advertise through the local gym for a muscle / high protein version of Lite 'n'Easy. The existing L & E is not suitable. It's actually a very % of carbs -'cos protein is expensive.
Or maybe this could be a business for you and your friends?
im starting to think this as well, the bodybuilders Light and Easy equivalent,
or the restaurant idea was a good one!