If I have a diesel forklift to unload/load machines from trucks, is there a better fuel to use when I also have to spend some time in the shop moving them and setting them in place? I have heard kerosene or biodiesel would be close to perfect for breathability when using in the shop on a short term basis. Or, because I am never more that 50-70 feet from the door, a tig welded adaptor and a hose leading outdoors? I am looking at a 15,000 pound forklift for $4500 instead of $15,000 plus because it is diesel. Thoughts?