Expanding to 3 to 5 1080p projectors in portrait. Completely confused need help.

[MAYAman]

Hello people,

In my thread here some of you have seen my triple projector setup. I love it but I am wanting to add another rig for flight sims with large vertical FOV. I'm either going to buy a SimPit Titan, or alter my current rig with additional panels.

I need help selecting which projectors would do this.
Which and how many graphics cards
Which projectors would allow lens shift, keystone, and adjustments in portrait mode.

Any help is appreciated.

Thanks