see also:

• timelapse photography

• http://www.iflowpro.com/
• non-motorized dolly but compact, inexpensive ($US149) and the spring-loaded cams can attach to any surface from 1/4“ to 2” wide such as metal hand rails

• http://rollocam.com/
• ultra-compact motorized dolly

• https://www.edelkrone.com/p/138/slider-plus
• compact slider technology and optional:
  • Action Module to control timelapse, slide control, stop motion and macro slide
  • Target module automatically pans to keep the camera pointing at a close target while the camera moves along the slider