Don't waste your money
When missing any amount of concrete, it is extremely hard to use. A cement mixer would certainly be better. If you use it for mixing compost it would just fine. Watching the video, you'd think it would be easy, but not so. I rented a mixer after I poured the first 36" X 36" pad.
Don't waste your money, rent a small portable mixer if doing any type of concrete work.
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