I have heard of estimates of up to 10 grand for dispensers with card readers. With limited space and changing of piping, this might prove a logistical/financial challenge to many service stations.
Currently most gas stations have 4 tanks. Regular, Plus, Premium and Diesel. If they add an additional one just for E10, what octane rating will it be as there are older vehicles that require each grade? I can see two as a minimum. Regular and Premium. It's gonna cost stations a lot more than $10K to add all the tanks, extra lines and upgrade the dispensers.
Marty