Everybody's heard of the proverbial "home run." It's where someone succeeds to a degree that by any measure, it was more than a hit.
I have my own system of scoring the baseball metaphor.
Strike: no sales.
Foul ball: you're selling, but you're still losing money.
First base: you're making money on the deal. You're in the black, but it's not enough to make your living doing it.
Second base: you're making your living from it.
Third base: you no longer worry about money.
Home run: your kids no longer worry about money.