A 3-screen option is possible with some video cards, and this is great to show a huge screen with video action in the middle, and the data screens (12 riders per side) on either side of the "action" screen. This way, placement and sight-lines for riders are simplified, since they need only see their own data screen and the action screen.
We recommend that you project the action screen LOW, close to the floor, since riders like to ride with their heads in their normal riding position, and that's normally down. It presents the virtual roadway where it is in real life...down there. Your clients will strain unnaturally to see monitors if they are located up high, and they will not adopt normal riding postures. That pretty much negates all of the positives of riding their own bike in your studio.