WiFi hotspot

How could a contractor set up a wifi hotspot with a Rachio controller at a commercial property - such as a street median with electricity?

A smatprtphone with a cellular data contract would do it. How much can you afford to spend?

What is the cost? This is what I want to know. Not how much I am willing to spend. And I want to know how to set it up with a Rachio controller. Thanks.