He rented the adjoining room a used that location to shoot at the fuel tanks. It would not have been a good location to use to shoot at the concert goers.
There are only 2 windows that were damaged so any shooting could occur.
Both of those windows were part of the large Suite at the end of the corridor that he was in.
He used the girlfriend’s Players Club card & room was in her name.
IF he was a high roller & known to the casinos in Vegas, he would have been able to get such a suite—with windows that viewed 2 directions. There are 7 windows & framework of the building between the 2 damaged windows. COUNT THEM in the videos. To top things off, I am pretty sure he was comped that suite....and the food he ordered.
I live in N Nevada, and such comping of facilities is normal between casinos & high rollers.