thanks. looking around, one of the new ones, maybe the Bullet 580, I can't really remember, had a cruising speed of 35mph and a top speed of 80 mph. So, I think it would only really be practical if you're flying a short distance, like in one region of the US, provided tickets are about the same price as gas.
BUT THE BIG PROBLEM IS:
>The Bullet 580, a helium-filled tanker, can carry 1,000 pounds of payloads up to 20,000 feet above Earth.
> can carry 1,000 pounds of payloads
>ONLY 1,000 POUNDS
>THAT'S LIKE 1/5 THE WEIGHT OF THE AVERAGE AMERICAN
THAT'S. NOT. PRACTICAL. You've got to at LEAST carry a bus worth of people. Shit, 3 hot air balloons could carry that.