If your front lawn is truly 10' x 20', you could just about use the Weed-whacker. look around the neighborhood and see what your neighbors are using, if you do not see any electrics that should answer your question. With that small of grass area, I would buy a gas mower because you don't have to keep more than a gallon of gas for the year in storage, no big deal. I would seriously check with my neighbors, that's going to be your best measurement what to buy.
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