Why do you need to have quads? Is it for animation for when you put bones in and move something around like an arm, or is it something else?
If say a plate with no moving parts or a ball would it still need to all be quads? A ball would move around but it wouldn't move around like say an arm or a face. Let me know if you need more clarification. The asset is to be put in a game.
Also does the quad need to be square shaped or does it just need to have 4 verts?