This is what happens when we don't teach people math. There's no way, even without taking into account the risk of fire and damage to your property, that hoarding gas is going to be at all cost effective. I don't care how long they were going to try to store 45 gallons worth of gas, it's never going to be long enough to generate a reasonable profit. And if they were going to try to increase the volume of their hoard, they would have gotten into issues with storage space long before it got to any point that could potentially be profitable. So when you factor in what should have been the somewhat obvious risk of storing gasoline this way, it turns into a really horrible idea.
Also, there was one part of the article that struck me as odd.
State law prohibits storing more than a quart of gasoline in a home, including attached garages.
What the fuck? Do these people not have lawn equipment? I routinely had around 5 - 10 gallons of gas in my house for the lawn mower and edger. I can't imagine that anyone follows this law. They'd have to go to the gas station everytime they had to do yard work.