Hitman
BodyGaurd
Armsdealer
Drugsdealer

Hitman : if there's a call system keep a number for hitman and tell them some info or make they'll get pm'ed by someone who wants someone killed

Bodygaurd : They'll protect people and get money from it

Armsdealer : They sell weapons

Drugsdealer : They sell drugs

So how are the suggestions?