New to making gil

[StouterTaru]

The game gives you a lot of tomestones of Poetics. With those, I regularly buy stacks of demicrystals at Idylshire. These cost 25 poetics and sell for 500 Gil to a vendor.

For 150 Poetics you can get some good dirt, which will probably get you more on the MB. Buy the Unidentifiable Ore (or Shell) from the special arms section of the Idylshire Poetics vendor, go 2 NPCs to your right and trade them under Uncanny Knickknacks for Grade 3 Than (Shroud) topsoil. The prices might be under 10k each now, but they'll spike up when they add new seeds or garden farms or extra housing.