A prospective student decides long before they apply.
Choosing where to train is a big, personal decision, and your audience across Georgetown, Capitol Hill, and the rest of Washington, D.C. is mostly teenagers and young adults who research on their phones. They don't answer cold calls. They follow you, fall off, and come back, and they expect a text, not a voicemail. Without a way to stay in front of them, you lose students you never knew were considering you.
If nobody follows up by text, nobody shows them your ads again, and you can’t tell which class an inquiry was even about, you're only catching the few who sign up on their own, and missing everyone still making up their mind.