I’d get at least 2 12″ screens, then you can put power poles on both sides of the back of the bed and mount SI transducers on both of them. Then, have each screen setup so that it’s only looking at one side of the UTV. That’s a 12″ SI display for each side of the UTV!
The most important part of this setup though is to hire a man-servant to drill two holes perfectly underneath the power poles as you are checking spots, then just drop the power poles and find the fish from the warmth of your cab!
Pretty small investment overall, especially when I think of how many more 6″ sunnies I’d catch around the metro with that rig!