Yeah, not to be a jerk or anything, but you're basically asking people to give you gil. For all we know, you're not actually planning to use NIN, but you want the fame so that you can do The Sahagin's Stash and then sell Utsusemi: Ichi.
It's not *that* much effort. I did it myself, and I've helped a few LS members do it. If you really want NIN, then ask your LS members for some support. If you balk at the potential expense of earning the fame to do your scroll quests, then NIN is not for you. It costs money to cast those spells, you know.
You've already got everything you need - BLM35/THF15 is perfect for farming in Giddeus. Do all the Gobbiebag quests you can, empty your pockets, and start killing as much as you can. Fill your pockets, warp back to Windurst Woods, lather, rinse, repeat.