The simplest solution to the first difficulty is several dozen kilograms of Boron-11 (11B) for one delivery40,000 tons cargo from Earth to Mars. To braking cargo. Why exactly Boron-11 (11B)? Jonathan Tennenbaum answered this question popularly
( https://asiatimes.com/2020/04/hydrogen-boron-fusion-be-a-dream-come-true/
https://asiatimes.com/2020/04/nuclear-powers-ray-of-hope-hydrogen-born-fusion/ )
1. Practically Unlimited Reservs of Fuel
2. Radioactivity-Free Energy Generation
3. Direct Electricity Generation.
Now about the second unobvious difficulty in creating vimanasnextday. Energy. It does not need to increase full energy, but it is necessary for the management of gravity and 4all tech&bio systems of vimanasnextday itself. It needs several orders of magnitude less, but it is still needed. And this is not chemical but nuclear reaction since. There is a lottalot of energy. Compact and Radioactivity-Free Energy. Almost the same result is achieved using Lithium-7 or Helium-3 with much greater complexity of a very comprehensive nuclear converter. The second decision
unobvious difficulty is an engineering solution for smart engineers. That’s why …
… The Next Message Will Be About the Q of the Third Unobvious Difficulty in Creating Vimanasnextday
Apdeita.
About the price of cargo from Earth to Mars. Now almost any space cargo (except nonorbital) is early or later returns back to the ground. The Earth’s cargo delivered to Mars will not return to the motherground. He will be “lost forever” for the Earth. As well as the Martian cargo delivered to the Earth will alzo be “lost forever” for the Mars. Therefore, most likely, non-returning back to planets cargo (materials, equipment …) will be more expensive than intra-planetary goods.
How much more or cheaper (?) will be more expensive or cheaper determine the interplanetary trading organization (ITO)