Thanks to both of you for the information. I plan to fill out only form I-130 now because my parents really wanna go Nepal before Dashain. Also Form I-185 is costly, $1140, so my plan is to fill out only I-130 now. My only confusion is, like Gaulejetho mentioned, is it problematic to travel to Nepal while I petition for them, i.e file I-130 form. If it is really problematic, I can wait until my parents return back to Nepal( like a month later) .The thing is my father is working now, he is not making a lot though, but still it helps. I hope you guys understand what I am trying to do. Please suggest me. Thanks again for sharing your experience and knowledge.