The money isn't ours to begin with; the money is God's
Can our prayers cause God to change His mind?
God is always the same. After Moses hit the rock, he prayed that God would let him into Israel. God let Moses see Israel but he couldn't go over because God never changes.
Is "one man, one woman" the only kind of union God approves of?
Yes it is. That's why God made 2 genders & not just 1