the financial consideration is most worried by many students

为什么要用被动态呢?
财政问题是最困扰留学生的!完全可以说：
The financial consideration is the top problem worring many students who study abroad!
你的原话是财政问题被留学生干扰
再问： many students who study abroad are most worried by financial consideration ！ 写错了
再答： 可以。但最好把 by 变成 about.