I set up something similar several years ago (pre-Rachio) using 1/2" polyethylene (black) tubing and mist fittings. It worked great. Eventually I even went so far as to use in-ground lawn sprinkler heads with some bits of PVC and barb fittings. The spray points for those were ‘near enough’ to locations with the black hose that I only had to dig a hole for the head and about a 2" run-up trench to it. The rest of the hose was hidden under mulch.
This time around, however, we went with a fully in-ground setup with an 8-zone Rachio. It’s been fantastic. Right now only 5 zones are in use. Next spring I plan on adding the back yard and some misting heads for patio planters.