Nice link from Casey there. I was captured by his analysis of perchlorates in the soil, because you can decompose it to release oxygen, as well as obviously make another type of rocket fuel (on top of other local products like methane, oxygen, and hydrogen).
This isn't strictly related but in the section on tensile structures the author mentioned the Goodyear Inflatoplane[1], which is one of the craziest things I'd never heard of.
https://caseyhandmer.wordpress.com/2020/04/20/even-the-dirt-...