最近想给在国内的父母申请绿卡, 有些问题想请教下：
1.他们以前探亲时签的10年visa. 办绿卡的话他们呆在国内 vs. 他们马上来美探亲, 两者办卡时间哪个更快呢？
-If they come to US after you file I-130 for them, they probably will not be allowed to enter US using B2 visa due to immigrant intent. So, they may just come to US, then you can sponsor their green card after they enter US for about 3 months later.
2. 父母年龄大,快80了会不会不好办（移民局会不会觉得来了之后要提供看病等福利）
-It is irrelevant.
3. 我如果收入不多, 老公可以作为主申请人吗?
-No, but your spouse can file I-864A together with your I-864, thus you can use his income to sponosr your parents.
4. 如果过段时间老公父母也要办绿卡, 是不是会有影响（他一人申请4个老人来?)
-No problem as long as yopu have enough money.
万分感谢！！！
