Is there easy way for Gil?

[Zetsumei_Tsunarashi]

Gathering retainers are fairly decent and mostly passive income. They will require an initial time commitment upfront, but it pays off.

Yep. This is how I've gotten a lot of money recently. My retainers have brought me back 2 koalas, and 3 mameshibas. And sold them all for around a 50m total. All this income without being even logged into the game.