Which room? He had two rooms. Why the second broken window in the second room? He can't have been running back and forth between the two. Notice the stairway is right there, too.
After viewing the hotel layout, It’s highly plausible that there could have been others that slipped out before security had arrived. Very easily.
Actually that’s exactly what they are saying he was doing - running between windows because each window offered a different field of fire.
Trouble with that theory is that you’re dealing with an overweight, out-of-shape sixty-three year old guy with a history that includes a fall in a casino which required medical treatment.
Someone wants you to believe that *this* guy ran between those windows and fired hundreds of rounds through bump-stock modified rifles for eleven minutes. And then shot himself.
Note - The two bedrooms had adjoining doors. Easy to walk back and forth. And the time span between bursts fits real well with that scenario.
"The two bedrooms had adjoining doors"
What does that mean? Maybe the diagram just doesn't show detail of the actual door(s).
Listen to the audio on this video - taken by a cab driver who appears to be recording from a stationary position in the drive-through at lobby:
The first burst is loud and clear -
(from the bedroom window on the left -- above the drive-through?)
https://www.youtube.com/watch?v=WNiRr763gJA&t=3s
Big difference with the second, muffled, burst - 40 seconds later:
(from the window on the right in the open area?)
https://www.youtube.com/watch?v=WNiRr763gJA&feature=youtu.be&t=43s
Whether through adjoining doors - or through the hallway (where he had cameras to see if the path was clear), 40 seconds is plenty of time to move between positions.