Do you enjoy watering? Be honest, now.
Native plants are water-once plants. OK, once is the first summer, the summer during which native plants grow down, into the ground, instead of up, toward the sky.
But the second year, and subsequent years, native plant roots are deep such that the native plant needs water from you only during drought.
You will need to water your non-native plants, and your lawn, more frequently than you will water your native plants. Another question. Do you enjoy removing bugs feasting on your decorative plants? Really? You will spend much less time removing from native plants for example aphids or Japanese beetles, because aphids and Japanese beetles ignore most native plants.