You should really look at build123d -- it is a full CAD package including 3D but it also treats 1D and 2D as first class citizens.

Your idea about drawing lines is already supported in build123d:

  m1 = Line((0,0),(0,24))      # vertical line
  m2 = Line(m1@1,m1@1+(24,0))  # horizontal line starting at the end of m1