Hi. I am a US Citizen and my husband has an F1 visa (student's visa). I want to try to get him a Green Card as it might be easier for him when applying for jobs once he has completed his PhD. If anyone has done this for their spouse within the last two or three years, can you please tell me the process and what forms we have to fill up to send? Also, do you know if there is any kind of waiver of fees as we fall in the low income bracket (less than $25,000)? Thank you so much in advance.