Install drip irrigation for efficienty water use. Ensure that your irrgation specialist install lines at code and that you know the depth and routes so that a shovel can be used to remove tap roots without hitting lines.
Personally, I don't have irrigation on my own properties because:
Weed patrol—I enjoy hand watering so as to monitor the health of my plants up close.
Water-wise plants—I water once every 10 days in summer, and I choose plants that are drought tolerant. I also use mulch, which tends to help retain moisture. Although I pay someone to water when I'm away on vacation, I save $ in irrigation maintenance and line blowouts.
Weed removal—I prefer a weed-free landscape. So, I use a deep-shovel approach to getting tap roots, and there's always a risk to hitting irrigation. Grand Valley is notorious for elm trees and bindweed, and their tap roots are deep.