I remember several years ago, a new zeland man built and published in the net "Build you own cruise missile at home". He explained every detail and he pointed also that he spent "only" U$10.000 for doing it... The result was a flying machine very similar to the Nazi V1 and on a first look very capable of doing "the misson". What I don't remember is about the payload...
In any case, no flight report was published, My guess is authorities took place.