It’s not in earth orbit. Which you are well aware. It’s between Mars and Jupiter. I gave a reasonable cost structure based on FACTS. Do they same to support your viewpoint and we can continue this discussion
BUT... COMMA...
However, you are completely dismissing the promise of new technology that is now being tested both in labs on Earth and in orbit. Coupled with PRIVATE companies speculating on $2Q in potential returns? You'd have to be a complete Luddite lunatic to think they won't find a way...
DIY testers are currently building their own EM drive test rigs for around $10k. These units produce enough Newtons in thrust to out perform photon rockets and ion drives. Couple that with the fact that robotic mining probes aren't going to need a full science package like Cassini, won't have the fuel costs associated with other probes/missions, etc... The costs aren't nearly what you are portraying them as.