The collective farm that produced SpaceX is the United States Government. It carried out all the research and development necessary to create and further the North American space program. And it is existential in furthering it to this day. Without this source of contracts, research projects and income SpaceX would not be able to produce its commercial spin-off products.
It looks like this system was created out of necessity; there was no viable product for what they needed. Necessity is the mother of innovation after all, and we find this sorts of innovation frequently in non-collectivized entrepreneurships as well. Still, very cool!
By this logic capitalism is the thing holding back capitalist farms from being rocket makers too? Or do you only apply it when you get to use the word "collective"?
Of course it is the logic of collective. In capitalism you decide how you'd want to spend your resources, on a farm or on a rocket. In collective it is collective who decides.