Home Depot has various irrigation controllers on sale for $79-199 with rebates. Potentially FAR - Free After Rebate.
Rebate link under product price. Amount based on zip/address.
Some water districts offer rebates to help offset costs for these systems.
Example of irrigation Controller rebates are $80 and station is $35.
Orbit B-hyve 12-Zone Indoor/Outdoor Smart Sprinkler Controller, Works with Amazon Alexa for on sale for $79. OOS for Shipping
(The 6 zone is $84.60)
Rachio 8-Zone Refurbished R3 Smart Sprinkler Controller on sale for $159.
Rachio 16-Zone Refurbished R3 Smart Sprinkler Controller on sale for $199