Um, I've made over 100k just running my daily Duty Roulettes so far... SE really screwed up here because there are so many more gil fountains and so few gil sinks now. Inflation has already begun. Honestly, housing is a joke. Gil is pointless, as everyone is swimming in Tomestones and there is nothing to spend gil on. Even food persists after death, so you save money there too.

In short, to make gil, all you have to do is actually play the game.