like Topsy, it just sort of grewed!
We started with 6, then got another dozen, then found it made economic sense, did some sums - found the land, converted a vast barn into accommodation for hens with several acres for them to roam over, and went into business (the arrival of 2,000 point-of-lay pullets is quite an occasion)
We were "before our time", we wanted to go fully organic, but there wasn't an economic source of organic feed twenty years ago, so we went "second best", and used additive free feeds (no antibiotics or synthetic colours), and were totally free-range, and while it was going built up a good trade for people with kids who had acute allergy problems - people would drive 60 miles every week to get a tray of eggs, bnecause it was perhaps only one out of six food items that they could eat!
Unfortunately, we just didn't have the capital to get to an economic size, and after three years sold the rounds off to a rival, and closed down - but I still like chooks!