I had a buddy that was making it, it took 3 days and a lot of work to make a batch of 40 gallons. He finally figured out that diesel is well worth the money you pay for it. Plus, we would need a heated fuel tank to use about half the year. The one big problem is that you by the fuel in order to produce work from the stored energy potential, but in this case you have to do alot of work to produce a fuel that will do work for you, I guess it depends on how busy you are. Myself, I would blow through 40 gallons of fuel in half a day during hay season.