Citroen berlingo van. Rear doors are asymmetric, so it can be fitted fully on the main door to be central. No windows, would have to be drilled through the skin.
Has a detachable towbar, so a camera would help on hooking on a trailer, but my idea of fitting it inside the bumper, the towbar would be above the viewpoint and obscure the image.
Door handle height would be ideal, but needs to be at the right angle to see the towbar, and the road when reversing.
I think ill just get an adjustable bracket version, or cut this one up to make it adjustable.