I Became the Richest Immortal by Being Stingy

Poverty-stricken Li Goudan accidentally activates the Frugality Sutra, cultivating immortality by eating wild greens and scavenging scrap to save up “silver-fragment qi.” Armed with the logic of a miser, he takes on extravagant cultivators, going from the biggest junk dealer in the mortal realm to the richest man in the immortal realm. He's the most “economical” legend in the cultivation world.