For those whose "hobby" must also make a profit, the answer lies in a couple of areas. First, high laying hens. If you are all about eggs, eggs, and more eggs, you're pretty much forced to consider Leghorns for white eggs and ISA Brown or similar for brown eggs. Those are the industry leaders, and yes, you'll have to turn them over every year to 18 months. Again, this is if you want to deal with the business side of things.
Second, you'll have to find a better source of feed than 40 lb bags at a retail store. You'll have to find an old fashioned feed mill than sacks in a generic, string tie closure kind of place. 100 lbs at $19.50 makes your price look very, very expensive. That is for a premium, 17% Hubbard layer mash.
Ranging helps a lot. If they can get even 10-15% of their intake from ranging, that's a big plus. Unfortunately, up north, our season is fairly short, so it only helps so much. Ration feeding to prevent loss of feed to rodents is also very important. No feed out at night. Period.
Not everyone HAS to make a profit from their hobby. But for those who must, the final key is having great customers who are willing to pay the area's premium price for eggs. That premium in our local area is quite low, making all these management choices even more acute.