Moon has water. Tons of it......................
so does mars.
the key to life on the moon and mars is to learn to desalinate water there in such a way as to harvest the minerals and metals in the salt water. you learn to do that by doing desalinating efficiently (meaning removing AND separating out the minerals and metals in seawater—and selling them at profit) on earth. the by product of this is that seawater desalination becomes much cheaper—cheap enough for desert farming.