There was a ranch here in OK that purchased a young zebra stallion for the purpose of breeding zorses, however I don't believe they still have him. They had done a lot of research I remember reading everything they had posted. Like Spastic said, according to this they are very temperamental and can be very difficult to train. The breeding age is different also males are upwards of 5 years old before breeding while typical horses can and often do breed at a much younger age. Stud fees can be anywhere from 5k to who knows, I believe they had theirs at around 5000 and had paid 10k for him.
Courage is being scared to death but saddling up anyway~~John Wayne