http://www.solnx.org has been around 25 years, and demonstrates what is possible with fully automated engineering, using the moon as an initial source of mass for replication.
We are almost there.
And stability requires us to go well beyond any of the traditional paradigms of understanding, and actually start to get a reasonable handle on just exactly what our consciousness is, and how this conscious experience can influence the vast set of subconscious processes that are within each of us and make consciousness possible.
Understanding that all conscious experience is of a subconsciously created model of reality, rather than of reality itself, is step one in a sense.
Where anyone goes from there is entirely a matter of individual choice, provided only that in making such choices they exhibit universal respect for the life and liberty of all sapient entities, human and non-human, biological and non-biological.