However, you may have to interview several times to find a niche. This is the major disadvantage to foreigners teaching English in Taiwan. It's not cheap to live in the big cities and not that much cheaper to live in the countryside. The major factor is housing. And not that great.
All transportation is convenient and quite reasonable.
Don't plan on saving too much your first year. Although the Native speaker seems to enjoy a slight edge in the race for the best job, the recently returned Chinese also can enjoy an edge because they require no visa and therefore, at least in theory, will stay longer. All nationalities and races are welcomed in Taiwan , so more and more of the English teachers are from all over the world. However, many of these expatriates are Chinese that have lived or were born in countries outside Taiwan. In general, Taiwanese treat Americans and other nationalities very, very well.