Exactly, and if your monetary stream is inconsistent, then 3-6 months should really be considered insufficient. You're shouldn't be regularly be eating into your emergency fund.
Hell, make it at least a year. If you can't plan this far ahead, either your expenses are too high or you're doing something that is not sustainable. At least a year should be a long-term goal if you're doing something which is at all exposed to random acts of God.