I wish I had a large number of nice commercial cows that I could AI. Some really nice bulls' straws sell very reasonably, and without the certificate, you could bring any bloodline you needed to replace your cows with the new heifers. Then if they give volume discounts, it would be cheaper than buying a bull, hauling him home, and feeding him. Dun AI's his commercial cows. I am like you are on the odds of something working if it involves a lot of money and my total livlihood. But with one animal, I would try to beat the odds if I had the time, good resources, and some knowledge Mostly if the animal seemed to have a positive reaction to the treatment.