Using herd instinct to his advantage, and increasing his pastures to 100 acres would give him roughly 20 days feed. Time spent to have cattle graze in exactly the same manner would amount to going out once a day to check on the cattle by simply going to the front and having the cattle walk past him would be roughly 20 minutes a day.or the equivalent of 5 work weeks in other professions... Or one and a quarter month's vacation. Even figuring his time at only $10 an hour using herd instinct would save him $2,000 over the course of the growing season in time alone.
So the first question on everyone's mind is "What about herd density?" Not to worry, cattle behaving as a herd will graze at least as tight as when forced into it by fencing, if not tighter as in the following picture.