This sport needs to be unified against the competition. What better way than for these two guys to bury old slights and get along. Perhaps the Mares on Fri and top Horses on Sat and then swap venues the next week. Co-op the purse to 50K for each. Make is a weekly cross venue double.
First nice step...... Jeff G opens the amateur races for Joe to drive in.
Would be a huge olive branch!
Or sit back and let the other sport competition kill you