Who do I Sacrifice - Wireless Video Camera Project

Latley Ive been stuck on building a wireless video camera car. I dont want to use one of my current models as a donor train so I need some suggestions. I'd like this train to be a special train like a inspection train or MOW train, even a tram. Im looking for something that has clearance for a camera and a 9 volt battery. A single motorized E231 may work but Im not sure if the motor feedback would affect the camera or not.