God's existence--A different approach

Normally I would delve further into this, but it seems you would at least accept that God is one of the plausible causes of the world, and that is enough for our current purpose. Using the process of elimination, we now would not need any direct evidence of God other than that the world exists (and that other possible causes have been crossed out) to prove his existence, would we?

Actually I still disagree with your first premise ("- everything that exists has a cause"). There is no proof of this.
Plus, if we do accept it, it must apply to God himself. If we allow God to be an exception, we must also be able to allow the universe as an exception: "Everything in the Universe has a cause, but the Universe itself has always existed".