When I went to Osaka, it is not actually too bad. You can stay at a shared guest house for somewhere near $200-300 USD a month. And price levels and cost of living or about halfway between the US and Taipei in Osaka.
I was also thinking of going to Xiamen. I have an English friend who runs a Jiu-Jitsu academy there and he would help me get settled and I was offered a job teaching 1-on-1 at a private tutoring company with 20 hours a week and a salary higher than Taipei, but with a lower cost of living. It would be neat to take the ferry from Keelung, to Kinmen, to Xiamen.
But I may stay, because I have a final interview for an online teaching company on Monday
It is true, but you only have one chance at life, why would you want to do something that makes you unhappy just because it is convenient.
Thanks for your advice