I tend to agree that there was a saudi arabian connection.
With all the evidence that I've seen, it really looks like Paddock was a gun dealer.
Without taking anything away from your points, it seems the good money is that the whole event was contrived as part of an assassination attempt of a Saudi Prince. If you look at what happened in Saudi Arabia, around the same time there was a mess of arrests, and still, they are still in what could be considered a civl war.
Prince Salaman is the one that the west should support. He wants women to drive and hajib optional, etc... (progress) and an end to jihad citing that the world knows of allah and there is no longer the need for (insert koran reference).
Wwg1wga.