I vote get 8-10 chicks the first year, and then 6 each year. A dozen layers should meet your needs most of the year.
In June-July when you are getting scads of eggs, freeze a couple dozen, I do a dozen, stir them till pretty yellow, and pour equal amounts in a muffin tins. Freeze and bag. Easy to pull out a certain number of eggs and bake with them or use as scrambled eggs in the dark, slow laying time of winter. I almost always will get a few eggs each day even during the darkest days, but not always. this way I can use my fresh eggs for breakfast, and the frozen for baking.
Mrs K