Native plants are hardier than exotics, need less water, are tolerant of the local weather, and are usually planted with their full size in mind, so less maintenance. The biggest maintenance is checking your drip lines periodically during the non-rainy season. I've had one of those yards and was actually disappointed because I love to garden and this one didn't need much work. Mulched properly, it will have no weeds and need less water. Companion planting will reduce bugs and native plants are going to be resistant to bugs anyway, so less spraying. What's not to love, except the absense of my favorites - ferns, begonias, fuschias etc, which aren't native to where I live but I grow them anyway.