YOU SAID:

And he's here to do some business with the big iron on his hip

INTO JAPANESE

彼は腰の大きな鉄で商売をするためにここにいる

BACK INTO ENGLISH

He's here to do business with the big iron on his waist.

INTO JAPANESE

彼は腰の大きな鉄で商売をするためにここに来ました。

BACK INTO ENGLISH

He came here to do business with a big iron on his waist.

INTO JAPANESE

彼は腰に大きなアイロンをかけてビジネスをするためにここに来た。

BACK INTO ENGLISH

He came here to do business with a big iron on his waist.