Dan, my kids have just been on an educational farm trip - these are fantastic fun, our kids LOVED it, but it is done by farmers here on a voluntary basis periodically throughout the year, they do it very professionally but it is not profit making at all, all voluntary.
Reading your post it's easy to sense your passion and enthusiasm and I'm sure you are the type to work your socks off. Perhaps the best way forward is to avoid the supermarkets altogether and go for the local butcher in every high street - people still like to shop there. Or perhaps get your own shop - say open 3 shops so you start to get a name in other towns too. People love the butcher / deli / veg / wineshop thing - a nice shop where the quality is always excellent and its an uplifting experience - a place that isn't a supermarket.
You would have to start in the right sort of town to get your reputation (would cost more but be worth it for the reputation). A tiny cafe on the side always works too, people are always hungry and want a pork roll with apple sauce etc. You need to get right on the high street, like other posts have said, the supermarkets will eat you alive.
