ALICE is unlikely to be the best idea for rocket fuel produced on Mars. We already know that it is easy to produce propellant on Mars using the sabatier reactio

ALICE is unlikely to be the best idea for rocket fuel produced on Mars. We already know that it is easy to produce propellant on Mars using the sabatier reaction and the Martian atmosphere as the primary ingredient (to produce liquid methane and O2). Not only is this a high grade rocket propellant but also the vast majority of the mass comes from the atmosphere. Of the mass of the propellant only 1/4 of it would be methane and of that only 1/4 would be Hydrogen (1/16th of the total mass). This makes it feasible to ship over the Hydrogen feedstock from Earth and generate the remaining 94% of the mass of propellant using Martian resources. However, the easier it is to get water on Mars the easier it is to produce propellant in this way. However, we already know that substantial amounts of water ice underlie most of the Martian surface, materials that are as much as half water by mass only a meter or so below ground. This new information only means that it will take much less equipment to get at small quantities of water nearer the surface.