He is already thinking of the lives of the men in the amount of money he will have to spend to earn the same amount of karma. By his calculations, it is worth a lot, so it is worthy of his time.
With this kind of value, he wants to kill more thugs and let more people know about it so that he will be able to maximize his karma from it.
So he couldn't wait as he went about asking people for information about the Black Band gang. This information included the whereabouts of their headquarters or base.
He wanted to know everything about them. Fortunately, there was an easy way to identify the member of a Black Band gang. They always had a black band around their arms, so they could be pointed out in a crowd.
This convenience reduced the difficulty of executing his plan. Combined with the information he got from the people that lived in the area, he was able to make swift progress in eliminating the Black Band gang.