Looks comfy. Can you tell how tall it is when folded? Do you need your right seat? The more cargo area you can make available, the better. For instance, my van is currently full from doors to seats with 3 skids. My bunk folds to the side wall. But I use an air mattress so it doesn't take up much width. I'm about 245-250#. 6' bunk I built with hinges, etc. It ain't fancy, but it works well.
But warning, air mattresses suck the heat right out of your body. You must have good heat or you won't sleep long. Trust me. I've struggled with my generator this winter and have paid the price for not having an Espar heater. If you can, get one installed. I hear it's DREAMY!!!!