The NBA's next big cash grab: Taking over your downtown

ON A GRAY, misty April afternoon in San Francisco, Golden State Warriors CEO Rick Welts stands atop a parking garage overlooking the massive cavity that, in just over one year's time, will house the three-time NBA champions.

"I could come down here every day," Welts says, holding an oversized Warriors umbrella at the site of the Chase Center, the team's future arena, which is set to open next season.

That umbrella will come in handy as the dollars pour down in the coming years by virtue of owning this private facility, but not all of those dollars will come from basketball. Relying solely on traditional revenue streams would've made it impossible for even the NBA's premier superteam to claim…