The availability of E85 is its killer.. there are about 1200 e85 stations in the united states... and specifically for me anyway 0 in Arizona. I did a college paper about this topic..
It can be up to $200,000.00 for a regular gas station to retrofit so they can carry and dispense e85 thats part of the reason for the lack of interest by businesses..
The whole problem is.. consumers don't see a reason buy a e85 car unless there are e85 stations.. but businesses wont retrofit until they can return the investment in equipment. The old chicken before the egg scenario...