How YouTuber Caleb Hammer turned financial train wrecks into a big business

Caleb Hammer grills a guest on "Financial Audit."

Caleb Hammer via YouTube

• YouTuber Caleb Hammer has attracted a large following by blending high-stakes personal drama and money tips.
• He's turned his online fame into a goldmine through memberships and his Dollarwise budgeting app.
• Hammer discussed how he's built his business and his edgy, sometimes polarizing style.

Caleb Hammer learned about money the hard way.

The host of the hit YouTube show "Financial...