Whirlybird "60 hours and not solo". More information required. Is this due to lack of aptitude, poor instruction, lessons too far apart, difficulty with just one thing eg lifting off vertically, poor decision making, personal issues, something else...
Without knowing more, I don't think your question can be answered.
Agree totally with too little info here. What are the goals of the student? Maybe they just want the experience, and are happy to fly with an instructor and does not fly that often. Nothing wrong with that. His money. Could be a whole host of reasons.