Worldpackers is a platform where travelers search for travel experiences, not a job. Our recommendation is that the amount of working hours in a week doesn’t surpass 30, that's because we believe that 30 hours per week or less is perceived as a fair balance between “work” and leisure.
If you need more help than 30 hours of help per week, consider receiving more volunteers at a time. Your position will be open for multiple travelers to apply as long as the dates are available, so you can receive more than one traveler at a time to help with different shifts.
And remember, Worldpackers are travelers, not employees.