First, do you have a degree?
Have you thought about teaching in China?
I have a Bachelor of Arts Degree but no TEOSL or TEFL certificate though. I have been teaching English in China for four years now.
You can go to China first to find a teaching job. After you have several years under your belt, you can return back to HK. You can find a job in your own field at that time or continue to teach in HK. There are just too many expats in HK now. If you have the experience, they will look twice.
I haven't done the courses but learning the course doesn't really help you too much in China though. The students are different. The students need to speak out more, but most out there do not teach you that though.
It is because the courses are taught for the purpose of teaching a second language in other countries besides China. Each country is different in terms of the students. You can learn something from the course but it might be different on what you need to teach according to the country you go to though.
Anyway, I'm teaching in China now. I am a Chinese Canadian. The only teacher hired as a foreigner that looks Chinese.
If you look Caucasian, it will be very easy for you to find a teaching job. If you come from US, Canada, Britain, Australia and New Zealand. The schools are always looking for these people in those countries.
Most schools will look for Caucasians first then second Blacks then last are Asians though.
OH well