Your request to run 3 zones at a time adds up to 2400 gallons per hour. With the 9' head, you would be right on the edge with the 1 hp pump, which will run on a 115v @20 amp circuit. You would be better served with the 1½ hp, but that would require a 25 or 30 amp circuit at 115. A better idea is to either arrange to have 240 for the motor, or rethink your zoning. With the array of timers available, there is really only a need to run one zone at a time. You can easily cover any size of property using timers and appropriate zoning.