Is a MacBook 12" dual monitor setup possible?
As per https://support.apple.com/kb/SP712?viewlocale=en_US, I regret to inform you of this:


  Graphics and Video Support
  
  Intel HD Graphics 5300
  
  Dual display and video mirroring: Simultaneously supports full native resolution on the built-in display and up to 3840 by 2160 pixels on an external display, both at millions of colors
  
  Display
  
  Retina display
  
  12-inch (diagonal) LED-backlit display with IPS technology
  2304-by-1440 resolution at 226 pixels per inch with support for
  millions of colors 16:10 aspect ratio Supported scaled resolutions:
  
  
  1440 by 900 
  1280 by 800 
  1024 by 640