$SPY does not have cheaper commisions than the ES. Anyone doing >100 contracts a day who is paying $4 a contract is paying way to much. Lease a seat, ~$600 a month and pay <$1.50 a contract.
33 contracts * 8 trades a day (4 entrys/exits) 264 cars a day.
264 * 50,000 = 13,200,000...