There’s nothing wrong with asking questions. That’s how we learn.
The student is paying for a trip, and there are many costs involved. Plus there are overhead factors, someone to answer the phone when people call. Someone to plan all the trips. Someone to vet all of the locations, do the paperwork with the governments, and many other things.
And there likely needs to be a reserve fund so that they can make deposits on housing and airfare, etc, in locations well before students have put in their money. So that $500,000 could be working capital for the next year’s programs.