WHERE in Taipei County? Schools near Taipei seldom have to bother with deals like that. It’s the way out there places like Hsin Chuang or Tai Shan (way out there if you don’t have a scooter) that usually will try to attract people like that.
That said, I lived in Hsin Chuang for a year, never saw a single “foreigner/non-Taiwanese” for about three months, lived in a breakfast shop with no windows and cockroaches wandering around, and was perfectly happy. It kept me from falling into the “I-only-know-Westerners-in-Taiwan” trap, and forced me to learn a lot of basic Mandarin, and some Taiwanese, very quickly.
They do the same thing in China. My friend went over on a deal, thinking that he was going to work in Shanghai. He spent a few days in Shanghai and loved it, before being told that there will be visa problems or something, and being posted to some tiny spot in the middle of nowhere. At least he was reading “The Lord of the Rings” in Mandarin by the end of his first year, though.
So if you don’t mind running the risk of possible isolation, go for it.