I'll just inject the sage wisdom of my neighbor looking at me working under my car with a floor jack: "Use jack stands buddy -- you can turn a good time into a bad time real fast without them." The same goes for engine hoists. Dent your car body using a homemade rig, drop your engine on the floor or worst of all, on yourself or a buddy, and you will truly have turned a good time into a bad time real fast. Jeezus K. Reist, it costs $50 to fill it up now, and you're gonna worry about dropping a C-note on a hoist? You can surely get most of it back reselling it. And if you can't find one to borrow free or rent for $25, you're living in the wrong neighborhood. Hell, I got mine free then gave it away because it was taking up too much space.