Regarding the I-601A, there is no known processing times yet for us to determine how long the case will take. No filing have been accepted yet and therefore there is no past history for us to review. If the I-130 is approved and you entered without inspection, you will likely have an interview at some point in CDJ. However, I would not leave until such time as you've determined all grounds of inadmissibility that would be triggered by your departure.
1. File at the address USCIS will provide in March.
2. Wait for the provisional waiver to be approved
3. Travel abroad for the required interview and medical exam.
You should retain an experienced immigration lawyer to review all the facts, advise you, and handle the case. You can find one through http://www.ailalawyer.com.
J Charles Ferrari Eng & Nishimura 213.622.2255 The statement above is general in nature and does not constitute legal advice, as not all the facts are known. You should retain an attorney to review all the facts specific to your case in order to receive advise specific to your case. The statement above does not create an attorney/client relationship. Answers on Avvo can only be general ones, as specific answers would require knowledge of all the facts. As such, they may or may not apply to the question.