What happens to our economy when, as a society, we start feeding ourselves more and more and spend less at the grocery stores? When the demand for grocery store eggs drops, how does it impact our local economies as well as our national economy? What message does this send companies like Tyson, Perdue and Eggland?
Grain prices probably won't drop, but if the demand for eggs drops then the producers are going to have to lower their prices to compete (with people like you and me!) while their costs remain the same. Could this put the big poultry companies in a very uncomfortable financial position?
To answer your questions from an economic standpoint, as many other readers have correctly noticed, it takes a LOT of eggs to make the fixed costs associated with poultry "cheaper" than store bought chickens. Especially if you are an obsessive, overbuilding coop designer like me.
Never the less, to answer you questions, grain prices will go up. Yeah, I know, disappointing. Considering a constant elasticity of demand model, i.e. you eat 2 eggs every morning whether you buy them from the store or raise them at home, your chickens will likely be less efficient at conversion of grain into eggs, hence you will need more grain in order to produce your 2 eggs, which leads to an increase in demand for grain, and a subsequent increase in price.
The increase in grain prices will lead to a increase in egg prices. That's just the law of demand.
Most of the rest of your questions are answered in a round about way by considering the relative size the "home market" for eggs in relation to the "store market" for eggs. In that I mean to consider the number of people who are raising poultry for eggs in relation to the number of people who couldn't be bothered by the idea.
What will happen to our local economy? National economy? Big chicken and egg producers? Well, nothing.
People like you and I gain utility by raising chickens. We like to care for them, watch them peck at things, we like to build them a coop and paint it like a barn. (ok, maybe just me
) In spite of the fact that the eggs are expensive we do it anyway because we find other value in the project. My first batch of chicks and all the materials to house and feed them amounted to an expense of $270. That means in order to "break even" at your listed price, I need to produce 1,250.97 eggs from my flock of five! Not likely!
For all the other people who don't want/can't raise their own chickens, that's fine. They can buy their eggs. Don't come to this to "get back" at anyone or any company, do it for yourself, do it for the enjoyment you get out of making a more self sufficient lifestyle.