Planting mondo grass

I would like to plant mondo grass in a very large section of our front lawn as a way to shape the grass and create a nice landscape. Would buying such a large amount of mondo grass be expensive? Would I have to plant the mondo grass very close together in order to achieve a lawn-type look, or could I plant them separately, maybe six inches or so apart, and let them "grow in"? The effect I would like is similar to this picture.
q planting mondo grass, gardening, landscape
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