I just want to say that bloodlines =/= a good, breedable horse sometimes.
The mare I want to buy is roach-backed, jug-headed, odd in the shoulder, and her brother has a pronounced hunter's bump. Their half-sister is a national champion. Does that mean that, because Lady is RACKING HORSE FOR THE WIN, that Nighty should be bred? But they have the same bloodlines!! Oh, plus they have Ebony's Masterpiece in their bloodlines!!!!!! So? Nighty still has flaws. She's not fugly, but she's not what I'd call breedable.
You're right, bloodlines are not the only thing to be concerned about when breeding. Most of the people that have been asking about the mare and stallion's breeding have been worried about genetic defects though.
However, it is my firm belief that ALL horses used for breeding should be registered with their applicable breed society. Not some registry that someone made up to cover their horse, such as the "Prettee Poneh" registry. A legit, recognised body. Grade horses should never be bred from, IMHO.
OP - Good luck with your foal that you are clearly going to breed anyway. I hope for your mare's sake that she doesn't catch, or that your 'friend who breeds' accidently gelds the poor stallion before she gets there. Everyone has been more than helpful, pointing out MANY things you need to consider before you breed, which you seem to gloss over and ignore because those reasons don't benefit your arguements. Your few reasons for breeding are, frankly, wrong. You cannot know what temperament a foal will have, no matter what the parents are like. You cannot know that a mare will foal with no problems even if she has foaled 7 times before. You absolutely cannot breed for colour before type and health. It should be criminal.