I dont think their is any point in cloning since this plant is an auto.....it may only have time to root before it starts to flower.
If you are worried about height, tie down the branches to the outside lip of your big tote. You could also flip it to 12/12 right now which should speed up the flowering somewhat......still dependant of the strain itself.....but less veg lighting
I would think the tent you have ordered will have a 4" outlet to either side of the tent allowing you to exhaust out one side or the other. Not having to cut the shelf in your closet

Keep at it, your plant looks awesome