good better best prising plus add ons

src/modules/estimateWizard/data/tenantConfig.js

@@ -143,6 +143,10 @@ export const DEFAULT_PRICING = {
     pitchFactor: 1.0,        // multiplied per pitch/stories/complexity in admin
     taxPlaceholderPct: 0,
     permitPlaceholder: 0,
+    // No measurement source in the wizard (spec §3) → assume an average roof size
+    // so the customer sees a PRELIMINARY range. Verified during inspection.
+    assumedSquares: 25,      // ~2,500 sq ft of roof surface
+    rangeSpread: 0.08,       // ±8% band shown to the customer (low/base/high)
 };
 
 // ── Insurance discount scenarios (spec §10/§14) — low/base/high ───────────────