Building an oven also works if you have somebody to lift the cement sacks for you - means you have to plan a bit more, but it works
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I had no prior masonry experience at all, and still managed to build mine, so don't let that prevent you. If you enjoy making things and thinking through the challenges involved (always with the help and support of the forum when needed) go for it! Like George said, its one of the coolest things you'll ever do.