Seriously man, as my nan used to say - "When you're in a hole, stop digging". They guy says "spend 2 hours on the weekend", to which you reply "you can't stop a

Seriously man, as my nan used to say - "When you're in a hole, stop digging". They guy says "spend 2 hours on the weekend", to which you reply "you can't stop at 2 hours", yet at the same time you try to defend working only 40 hours? How inconsistent is that? The OP sketched out a baseline scenario, and you're saying "yeah but if you change assumptions, your conclusion doesn't hold!". No shit Sherlock? Perfectly valid and reasonable observation: "Yeah it is safe to drink 2 glasses of beer." You: "BEER IS EVIL! IF YOU DRINK 25 GALLONS YOU'LL DIE!" O RLY, who woulda thunk?