"In order to maintain his livelihood, a minimum amount of money is required."
"In order to maintain his lifestyle, a certain amount of sustenance is needed."
"In order to maintain his livelihood, a minimum amount of money is required."
"in order to ~" 「〜のために」
"to maintain his livelihood" 「彼は生活維持」
"a minimum amount of money" 「最低限の金」
"is required" 「必要だった」
"In order to maintain his lifestyle, a certain amount of sustenance is needed."
"maintain his lifestyle" 「彼は生活維持」」
"a certain amount of ~" 「なにがしかの〜」
"sustenance" 「糧」
"is needed" 「必要だった」
[これも](https://eikaiwa.dmm.com/uknow/questions/39409/)役に立ていると思いますので是非クリックしてください。