tbone902·2 ปีที่แล้ว·discussUnless you think you know better than the National Academy of Sciences. Cost of launch is the only recognized limitation (in 2012)https://nap.nationalacademies.org/read/13189/chapter/4?term=...Your question about delta-V is answered in that same report a few pages above.
tbone902·2 ปีที่แล้ว·discuss> no military background, no political background and no aerospace engineering backgroundYou're presuming a lot there.