Your contention, your burden.
I've shown it's plausible, I don't need to prove it, I'm suggesting it as a possibility.
What model? I've given two one which is the sum of contingent things and another which contains contingent things and non contingent things
The one where you've assumed that because a universe has contingent things in it it must therefore be a contingent thing itself. You know, the one everyone here keeps on at you to explain but you keep failing to do so.
Not sure what you are trying to say here
You've asked, in response to the proposal that the universe is not contingent upon anything else, why this universe rather than another, or why this universe instead of no universe at all - if the universe is non-contingent, then 'why' is meaningless, as by definition it has no cause. Similarly, if the universe is non-contingent, that does not presuppose that other universes (contingent or otherwise) cannot exist.
God is proposed as the necessary being. You are proposing the universe as a candidate. I.e. Not contingent on anything. The problem though is accountancy, namely what is the contingency in the universe contingent on? If you say the universe, you are saying that the contingent things are contingent on themselves, a causal loop and an absurdity.
You are presuming that the universe is the sum of its parts and not, rather, the source of them.
O.