Assume technology more advanced than current levels, let us theorise for this question that we are capable of reaching and if needed extracting material from any planet or moon / body in our solar system.
Question simply is would there actually be enough material available allowing for the above ( and what we could extract from other planets via huge automated mining operations perhaps ) in our solar system to build such a creation.
Given the size it would have to likely be , there does not seem to be enough erm "stuff" around to make it any more than a theoretical dream ?
I was not 100% sure which S.E to put this in , sorry if I have chosen the wrong one! :) I do not know how to move if if it is wrong.