If you crave for a gang/turf war side-activity then I recommend you to buy the scrap yard, once in a while if you're making profit the Lost MC will raid it and you have to defend it. You will not get a wanted level by the way.
Thanks, but that's not what would satisfy my craving. Right now, it's too late. There is nothing GTA V that covers this angle well. Only DLC with fixing features can resolve this.