The easiest way to reduce your feed cost is to reduce the number of head. If you have stockpiled eggs, they really are not "laid this morning'.
I would not worry about anyone else or the moral aspect to home raised verse commercial raised eggs. I have eaten, cooked and baked with both and they get the job done. I love having chickens, and eggs, but some eggs are not as good as others. I have had to buy eggs when my needs were more than my production, and those eggs worked just fine.
You need to make decisions for you, your set up, and your market. You are just way over production for your market. If you find another market - that would help, but it is hard to do.
So to reduce production, reduce your numbers. Selling laying hens is another way to recoup costs too. Going into winter, it is better to be under stocked than over stocked for your coop.
Mrs K