Once you get a strain you like, be it from hatchery stock or a slightly better-than-average backyard breeder, I'd stay with those few birds that are the best of bunch. I'd breed and cull until I had a bunch of birds I like. There's not much to be gained by constantly buying more and more hatchery stock, really, from my point of view. We've selectively bred our birds for 4 generations now and we honestly like what we have. They are far, far from type, quite honestly. You couldn't breed a true-to-standard or show type out of them if you took a decade or more of trying. The DNA just isn't there. But..... Healthy, thrifty, good laying birds? One cannot do any better than that, if what one wants is thrifty, healthy, good laying birds and we do.
Heritage lines simply aren't for everyone. Heritage birds are often larger, very slow to mature, often eat a lot and usually lay far fewer eggs. That's just the way it is. They can be impossible to find, as there simple aren't enough of them to go around. Breeders of the very best don't want to sell to hobbyists or backyard folks, particularly. They want to share their passion with other like-minded people who will breed and usually show them, which might be 1% of the population. Some of the top breeders only produce a few dozen birds a year, so it isn't as if you can just place an order for them. They must also be bred carefully or the flock will also go into decline in the out years as well.
Fred, those are some very grounded, sage, wise words of wisdom right there, and they are exactly what I needed to hear this afternoon. You just don't know how timely this was for me; I've been starting to get a bit of 'top quality heritage bird fever' as of late and 1) I can't really afford it and 2) I don't have any intention of showing birds so I don't really need it. THANK YOU!