I've just done some projected figures on egg production, based on 250 eggs per hen per year and 25p per egg (£1.50/ per half dozen). Let's just say it washes its face but it won't make me a fortune. If you cost in my time, I'd be working for less than nothing. At £1 a half dozen, I break even IF feed prices stay the same and I exclude my time.
I think we need to be careful to properly value what we produce and not undersell - one, it undervalues what we do and two, it makes life harder for small producers who are trying to make a living.