With so many issues that will affect your immigration status, you need an experienced US Immigration attorney to review the details of your immigration history (including filings) and the help create an approvable plan to move forward.
First, I would request that your Senator inquire from USCIS as to unreasonable delays in the processing of the I-829's. Also based upon the many inquiries you have made without a response from the old INS or now the USCIS, you may retain an experienced EB-5 attorney to file a Mandamus Action in Federal Court which will force the USCIS to respond. In your case you can withdraw your permanent residency claim under the I-829 that was filed and move forward with your I-485 application based upon your marriage to a U.S.citizen. Your father should not withdraw the I-829 until all family members obtain there unconditional permanent residency based upon the approval of the I-829.