One of the fundamental questions the OP has to answer is:
Do I really want to implement a QMS or pass an audit, i.e., attain certification?
If the goal is to truly implement a QMS and, by now, most of us have experienced the epiphany that took a while for the TC 176 to realize: the quality system has to be embedded in the organization's operational processes.
Using a canned manual, especially one that will have a manufacturing slant, would be extra challenging for a travel services organization and, probably, counterproductive to make the system seamlessly integrated with the day-to-day operations.
If the goal is to pass an audit, the equation changes.