Complicated questions...

First off, let me start by saying that from what I know so far, you'd probably be better off academically if you study at one of the top schools in HK or Singapore. Although I haven't studied there, the culture and language differences in Taiwan, even in an international English program, can get quite frustrating, and the Taiwanese aren't quite there yet when it comes to education globalization. With that said - they are trying, and I believe in a few years, if they'll keep at the current track, they'll arrive at the same level as the Singaporeans and HKese.

When it comes to finance - There's the Taiwan scholarship (~900-1000US$ a month), which is not bad, although nothing too exciting. Those who don't get Taiwan scholarship, get tuition waiver, free dorms and 300US$ a month for assistant-ship (which I highly -don't- recommend) in most universities. Some universities offer better scholarships (NCTU, NTU), some don't. Westerners teach English, some trade stuff on Ebay, and others (3rd world countries) just live on that.

I would like to see as many quality international students come to Taiwan, but I would strongly recommend that you keep a backup option with a Singapore/HK top-school. If you have the chance, I also strongly recommend coming in for a visit to see things for yourself. NCKU, for example, has a spring signup for free, and since tuition is also free you have nothing to lose, so you can come try that for a semester and if it doesn't suit you - go to plan B.

Let me know if you need anything else.