We have two diesel tanks, an oil tank for heat in our shop, and one gas because we do commercial construction. We used to have below ground tanks with pumps, but they have become difficult to have with all the enviromental stuff, so we took them out and now use above ground. In fact we are waiting on an ok from the town to build on land that was contaminated by an underground diesel tank. Best bet now is to go above ground if you have the room. For the average person who doesn't plan on using a lot frequently maybe a steel drum with a pump might be a better solution? Fill it once with gas cans and then make sure you keep it topped off. A drum is a bit easier to move around when needed then a big tank.