Yes, it is possible if you are prepared to wait for the green card for the next 14 years while either being outside of the US or maintaining a valid nonimmigrant status. Any other option would make you ineligible for that very green card.
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I agree, it is possible, but ir will likely take several years. This, it is better to file now rather than waiting oe year! Moreover, the sibling category could possibly be eliminated by the immigration reform. Thus, it is better to file now to be safe.
This information is provided as a courtesy based upon the limited information provided in your post and does not constitute an attorney-client relationship.
She can apply for you, but it will take at least 10 years, and you cannot stay here to wait for it unless you can maintain some other type of legal immigration status. I would strongly encourage you to discuss other options by scheduling a consultation with an immigration attorney.
Your sister may apply for you. Presently the waiting period exceeds 10 years, however, even though there is a long wait I recommend that you have her apply for you as thoroughly as possible. You should also consider having a consultation with an immigration attorney to explore other possibilities and to understand the process when a sibling applies for a brother or sister.
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