First off, this line is funny. When I read it, I laughed.
I also realized that attempting argue with this, an atheist perspective is useless to change the mind of the atheist.
If the God or God’s people had no need of money, the atheist would then claim some other cause for the situation and would still not believe. If God or God’s people had no need of money, they could then justify their own position by saying that this God is not fair and loving because is his not providing for others who may potentially follow him.
So, if God needs money or does not need money, in the end would not matter for convincing the atheist of the reality of God.
But he said to him, ‘If they do not hear Moses and the prophets, neither will they be persuaded though one rise from the dead.’ (Luke 16:31)
There are other elements of the quote for discussion: God’s need, role of money, role of God’s interaction with humanity. Think about it too much and there is no humor left.