In the history. The problem is usually old — the why-now is what changed: the final straw, the storm that finally came through the ceiling, the grandchild arriving, the winter they won't do again. Problems can exist for years without creating action; the trigger is the difference between a house with a problem and an appointment on your calendar.
The short answer
The training's method is historical: walk the problem's timeline — how long, what's been tried, what happened each time — and the trigger surfaces on its own, because people organize their decision around the moment it became urgent. Triggers can be negative (the leak that damaged the bedroom ceiling) or positive (the home they're getting ready for a new chapter), and timing itself is data: a homeowner who calls in October about a cold room has told you something a July caller hasn't.
How it runs
“Why now?” asked flatly sounds like a form. Asked as the natural follow-up to the history — what happened when it leaked? was that a pretty big repair? — it doesn't sound like a question about motivation at all, while answering exactly that. Two cautions. The trigger isn't always the primary buying motive; it's the starter, not necessarily the engine, so keep listening after you find it. And never manufacture urgency when you can discover it — invented pressure collapses under its own weight, while a discovered trigger is simply true, and the homeowner said it.
A weak why-now is also information: if nothing changed and nothing is pressing, motivation is thin, and the appointment should be run knowing it.
Spar grades your probing against the documented system, round by round. Round 1 is free. Spar before you knock.