Only see a few videos on this, and most are fake titles saying 1 million bounty etc lol, but I've finished the story and it seems to be capped at $1500. It's a bit boring, but I basically just wanted to see what the actual bounty cap was. Click the spoiler if you want to watch the video, there are no missions involved, but as I've completed the story, there are spoilers.
You have been warned!