Here is my opinion on the whole breeding issue. And it will not be a popular one I'm sure. I believe that it is your right to choose to breed regardless of quantity. I believe that we should be breeding quality BUT if you look at old breeding, some of the nicest animals come from some pretty plug looking animals so who am I to say what's quality. Those animals were sturdy and had what it takes.
I can't give you examples in minis I'm WAY too new to it but I bet there's some hidden horses in pedigrees that people would scratch their heads and say WHY? There is a horse that was pretty popular around there, he's know for throwing some pretty plug headed animals, but he was the gr. grandsire of a champion. Go look up Pudden Head and Bob Acre Doc in the AQHA and you'll see what I mean. Pudden Head looks like a plug. Honestly he does. But most everybody in the cutting industry knows Bob Acre Doc and if you don't well your head's under a rock. Granted it's a small portion of his pedigree but it's there and it's part of what makes that horse. This is just one example I can think of that I know allbreedpedigree has pics of both horses

This is why you'll never see me give a critique on 'breeding quality' I can point out faults but I'm never gonna say oh no...NEVER breed that animal, even if it's grade I'm not gonna say that. To each his own. I didn't even registered my gelding. He's a grandson of the old mare I just lost and from the moment he hit the ground I knew he wasn't going anywhere. He's got a great bloodline and probably should be registered but why? I can compete NRHA without his AQHA papers and that's all I care about.
People talk about 'backyard breeders' in a negative light yet some of my best horses have been raised in my backyard with bloodlines people have never heard of yet I knew many of the horses on that pedigree and liked every single one of them.
People talk about registrations, but what are they really? a record of lineage and an organization to provide shows. Lineage is fine and dandy but as I'm mentioned before there aren't enough mini shows locally for it to benefit me so I don't particularly care about the registrations either. I'm registering my boy because I can but I doubt it will ever be more than a slip of paper.
People talk about spaying and neutering dogs and limiting breeding, yet the small breeder is the one who is most effected but who is gonna raise the better puppy. There's a photo that was floating around on FB that shows a 'Inspected' facility vs a 'backyard breeder' that brings this home for me. The backyard breeder raises the pup in the home with interactions with the family, kids playing etc. And the 'Inspected' facility that meets all govt regulations is rows and rows of cages...a puppy mill. Which one do you think makes the better dog?
So my response after all those thoughts is: do what you want! and live with the choices.
My point being, breed for the traits you desire and commit yourself to that foal providing it the best opportunity and preparing to keep it if it doesn't sell. If you can't provide for it well that's when I say don't breed. My family and I bred QH's for years, going on 20 years for me personally, my dad has 50+years in it, and we always bred with the intention of keeping the foal if we couldn't sell it. I treat them as mine from day one and I work on the ones intended to sell as hard as the ones I always intended to keep. Sometimes I end up liking them better than I thought and I keep those too! lol. We saw this market coming LONG ago downsized before the markets went belly up (about 4 or 5 years ago.) We'd like to sell a few (3 of the younger ones would do it, the older ones are here to stay) but we're not giving them away either so here they sit, just getting better as we do more and more with the price going up, so when the right home comes along or the market does recover they'll sell just like they always do and those homes they go to will be better than the cheapskates who insults your quality animal because they wanted to buy a well trained horse for next to nothing. And yes I've had a guy offer $700 for one of my winning reining geldings...who by the way is another lifer anyway, but what a @#$% to insult me like that. The horse is easily worth about $20,000 even in this crappy market, more in a better market. If I had less impulse control I'd have probably decked him out cold or chased him off the property