Travel tutors can earn 6 figure salaries but at high personal costs.Ranta Images/Getty, Mykola Syvak/Getty, Anna Kim/Getty, Tyler Le/BITravel tutors can earn six figures a year, but that price tag comes at a personal cost.Tutors often have to contend with little to no social life while maintaining professional boundaries.They also need to be flexible, adapting to a family's plans and travel delays.When a missed flight left travel tutor Joanna Dunckley and her client stranded in a hotel, she wasted no time and turned the room into an impromptu classroom.Her job required the utmost flexibility: Some days, she'd teach math classes on a superyacht.