re: Too much of a challenge
Well?...It wouldn't hurt to keep track of the coordinates
of old or newly-discovered brown-dwarfs, especially those
with "small" radial velocities, and large "transverse velocities"...
And then hope that you have the astronomy equipment
that can resolve the image of that brown-dwarf.
What a discovery that would be! An Earth-mass planet detected orbiting a brown-dwarf.
Theorists who have to revise their ideas.