Size is important. For thin atmosphere or vacuum planet, airbag approach is optimal for small size lander, but for big size space crane is optimal. Unfortunate

Size is important. For thin atmosphere or vacuum planet, airbag approach is optimal for small size lander, but for big size space crane is optimal. Unfortunately, at the moment I could not suggest what is small and what is big for Moon. And for about IM, things could be even worse, as they are limited as commercial company (NASA lander could use government money to achieve much higher budget and have much more possibilities to do same thing).