Can't move origin to 3d cursor, I went back and followed the tutorials on it in blender basics but it still didn't move, my origin is in wrong place to flip the plans like he does here.
Hi Ford
Ford ,
That Reference Image is an Empty. you can't use Set Origin with Empties (or Cameras, Lights,...). You should reset the Offset to its Defaults of -0.5:

then you can use SHIFT+S (> Snap) > Selection to Cursor.