I do the math in a simple way: I keep a spreadsheet with one page for egg record, one for income, and one for outgoings, on an annual basis. By selling surplus eggs at 1.50 for 6, I've been able to cover my costs (including some capital expenditure and hatching eggs, but not coop purchase; I expect to get most of that back when, ultimately, I have to give up chicken-keeping for whatever reason and sell them on ebay or whatnot) for 4 years now. And that doesn't take into account any eggs we eat (so they're 'free') or new birds, when home bred. Given how much a sack of grain has risen in that time, and demand (far outweighs my ability to supply, so customers have to take turns getting cartons at this time of year, and they're grateful for any, whenever) I may need to raise the price next year, but I'll hold it down if I can, when the year's accounts are finalized.I agree, it's not cost effective in purely financial terms.
Ignoring all the "awww, they're so cute with moma" stuff there are some distinct advantages for the fully free range and the locked in at night ranging model.
For keepers that free range, not necessarily on large properties and can keep males, broody hatching makes a lot of sense. Get this right and you can have eggs and broodies hatching. The broodies are not only hatching future generations, they are providing meat in the guise of the chickens one can't afford to keep for whatever reason.
This is my favourite model but for many killing what they've seen raised is too difficult.
One also does away with the weeks of chick care (incubated or bought) and integration problems and if the parents are healthy one can be fairly confident they will produce heathy offspring.
Good job I don't expect the allotment chickens to pay their way.![]()