Enjoy this Green Gil guide:
http://www.reddit.com/r/ffxiv/commen...een_gil_guide/

You can make about 1 mil per month with all of that. And yes you can get some decent gil from dungeons and roulettes(even without in need bonuses). You can farm mats from world mobs and sell those on the marketboard through your retainers. Gathering is nice as well though not amazing but you can get some steady income going on.