Hi! I remember you, you are the one that always have non-HK boyfriends
I think I have said something like if you find a bf that is HKese next time, many of your problems will no longer problems. XD
back to your case, I honestly think it is not a good idea to married to Taiwan. The culture there is drastically different than here and it's really hard without your parents by your side. (I know from my own experience XD)
Your boyfriend will surely find a job; just look for China/Taiwan base companies, they don't require English or Cantonese. My friend's husband is Taiwanese and he has lived in HK for 10 years, yet his Cantonese is still very bad...XD
Anyway, sincerely wish you and your bf best of luck!