We believe that all or a significant portion of the trip would be a legitimate business expense according to Canada Revenue Agency guidelines (for other countries we have no comment). This is a learning trip via ELI, directed by a professional and experienced lead instructor, which integrates on-site learning throughout the entire trip. All of this is documented by way of your course binder, credentials of instructors, and certificate of completion. Of course, for family businesses, this expense would apply to all family members (i.e. spouse) participating in the trip.
CAVEAT: ELO provides no guarantee or assurance of the tax deductibility of this trip against your business income and no one should rely on this possibility as a basis for deciding to join the trip. All participants should seek their own professional advance to ascertain applicability to their circumstances and on that basis proceed accordingly.