The article in the original post gives us a pretty good idea of what the infrastructure for hydrogen vehicles will cost:
"Lentz said that Toyota has been working with University of California at Irvine to determine the optimal location of stations and how many stations the state actually needs to satisfy about 10,000 fuel cell vehicles. "That number is 68," he said."
"But for all the pros there's a major con: There's no place to fill up a hydrogen car, and it's expensive to build hydrogen stations; they cost about $2 million apiece."
68 stations x $2,000,000 per station = $136,000,000 to support 10,000 cars. This works out to $13,600 per car. It cost me $350 to get a 50 amp outlet installed in my garage since the electric grid is already built.