USA Cell Number Generation Guide

I’m preparing a sizeable SMS campaign and need a repeatable method for obtaining real, active U.S. cellphone numbers—no landlines, no VOIP, and no recycled lists. Rather than a data dump, I want you to walk me through the entire process so I can replicate it myself whenever required... (Budget: $10 - $30 USD, Jobs: Data Analysis, Data Collection, Data Entry, Data Governance, Data Integration, Data Management, Data Processing, Data Scraping)