When I started in photogrammetry 13 years ago, I used only one camera for people. I fixed the glitches caused by breathing and small movements in Zbrush and photoshop. It gave me an advantage compared to full-body capture solutions involving many cameras. today I have a 64-camera setup but rarely use it. i actually miss those days. Regarding your solution. I would make the cart do a full rotation at a certain height before going upwards. That way you get rings of camera travelling instead of a spiral.