- GaryLv 71 十年前最愛解答
It is impossible.
I take the financial issue aside for now.
Your father and your mother by birth are eligible for IR-5 Immigrant Visa. However, as the law regulates, IR-5 does not allow any derivative applicants. In other word, only your father, but not his new family get the visa.
The only way to make it work:
1. You sponsor your father > IR-5 Immigrant Visa
2. Your father sponsor his new family > F2A Immigrant Visa. At this moment, the waiting period is about 3 months.
For financial issues, you are not the one who need to be sponsor. You can ask your relatives or friends to help. Financial support is merely a contract the sponsor has with the U.S. Government that the immigrants will not rely on welfare.