[GreenCard] Which visa is best for me... (marriage in US)

My Fiancee (she is taiwanese) and I are going to go to america probably in december. She is going to be going to language school and I am going to be going to get my masters degree. We are planning on getting married within 90 days of entering the US. What would be the best way to go with dealing with visas. Fiancee visa, student visa, or visitor visa. From what I am hearing Fiancee visa take a long time to get and are not fun to deal with. But if she comes in with another status, it might also be a pain to deal with. How long does a Fiancee visa take (I would go to AIT with her to do everything)? I hear there is a min. income, does anyone know what that is? For the past year, I have only been a student in Taiwan studying chinese, so it that going to be a problem?