No travel time if students come to you.
No travel time if students come to you.
Also depends on age group, specialisation and hourly rates. There's a woman who teaches kids English, for ages from 6 months (!) through to 7 year olds (or maybe it's 5 or 6 years). HKD1000 for 30 minutes. Back to back 30 minute sessions the whole day (different kids every half hour, in case that's not clear :-)).
add in prep time and down time for students to leave and arrive (presuming you have a place to teach for free) its more like 60 hrs per week. Not part time. Not even close.
add in travel and you will be averaging 12 hr days. Seven days a week. For that, I would expect more than 84K
hourly-rate teaching always looks better on paper than it actually is.