Vitiligo costs confuse people because four unrelated pricing models sit under one condition. Consultations are per visit. Medication is per month at the pharmacy. Light treatment is per session across a course of many months. Surgery is per procedure, priced by the area covered and the technique used.
A meaningful estimate therefore needs to name all four, and needs to state the expected course length rather than a single session price. A clinic that quotes only the per-session figure is quoting the smallest honest number available.
Costs are given here after examination and in writing. Before an examination nobody can tell you how many sessions your particular patches will need, because that depends on site, duration and activity. The same three things that decide the treatment itself.