How many screens to go with.

I am building my flight sim and am not sure how many screens to use? What is better a  49" ultra-wide single screen or going with 3 screens, say 29"?
Just ordered a new custom build with plenty of power for whichever way I go.

With one beauty you will get a panoramic view of your flight.
With three you can move gauges to the outer two while watching the flight on the center.

Just a quick idea.