Something not quite right there.
And it seems to be your Esperanto. "Sambuko" is Esperanto for "elderberry".
Mars is a deep gravity well, and there's little evidence that there is anything in it we want.
We would probably want some gravity, actually. We are used to it. I enjoy it most when it's around 9.8 m/s^2.
A holding company is a thing where you hand an accomplice the goods while the policeman searches you.