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A Washington Post report on the burgeoning D.C. food truck scene offers some eye-popping stats from the business side of the mobile eats industry.

For instance, the Pi Pizzeria truck, which cost around $30,000 in start-up funds, nets about $1,000 a day.

Another interesting factoid—the number of vehicular vendors has more than doubled in the past year:

Randy Shore, co-founder of the strEATS, has tracked 67 vehicles currently on the road, compared to 29 when he and Daniel Preiss launched their online truck tracker last August.

The latest: a new Hawaiian-themed truck, called “Hula Girl,” serving teriyaki steak, macaroni salad and Spam sushi, among other things, launches July 18.

Photo by Joseph Barillari/Creative Commons Attribution-Share Alike 3.0 Unported license