When I design my methodology for the research proposal, do I need to consider whether the method is feasible or not for a student? I mean, if the method will cost a lot of money, need technological support, or it is hard to carry out for a student, should I use it?

Yes, you are right. Feasibility is an important factor to consider when you design a study. Unrealistically expensive and/or complicated designs might be viewed as lack of experience. It is indeed a challenge to come up a design both rigorous and practical. However, every applicant faces this challenge. At the end, those who demonstrate creativity and innovativeness in solving the dilemma win.

I attended a research seminar this afternoon, in which a marketing professor from a U.S. university presented a series of studies on the credibility of word-of-mouth on the Internet. I was very impressed by how little resources she used in setting up the studies to derive a lot of interesting results. One of the studies was simply a secondary analysis of movie reviews published on Yahoo!, which obviously cost her nothing at all. That's the kind of "creativity" and "innovativeness" I was talking about above.