Sounds like it might be a good product for you or someone to come out with :-) A 10MP N-scale camera car. What about a 2MP ESP8266-based Arducam? Lay it flat,

Sounds like it might be a good product for you or someone to come out with :-) A 10MP N-scale camera car. What about a 2MP ESP8266-based Arducam? Lay it flat, use a tiny mirror to get the image ahead. Power it by the rails. Only slightly larger than a standard N-scale boxcar. http://www.arducam.com/world-smallest-esp8266-wifi-camera/ http://www.arducam.com/world-smallest-esp8266-wifi-camera/ I'm an old model RRer myself. Hobby was just too expensive though.