Independent travel fits tasks, not an age label
Handling email, maps, payment, lateness and a minor illness alone does not mean needing no support. List ten things the student will do independently—arrival, check-in, class route, food, laundry, changes and medical help—and judge each with a backup contact.
An adviser’s value should be a deliverable
If using an adviser, ask exactly what is delivered: course comparison, document organisation, arrival link, housing communication or emergency coordination. Do not pay for 'worry-free throughout'; nor treat a visa decision, school admission or safety outcome as something an adviser can promise.
A mixed model is often more realistic
A student can choose school and attend classes independently while the school handles first-day transfer or housing. An adviser can assist documents while the student remains responsible for reading course, refund and housing rules. For every step, know who acts, pays and receives notices.
Use one rehearsal to set the support level
Before departure, have the student make a school enquiry, map an interchange and simulate a help call in the target language. Steps they cannot yet complete define the support needed, not a weakness to hide.