There are circumstances when filing two immigrant petitions is appropriate, and a qualified U.S. Immigration attorney (like those at our law firm), can help you coordinate the applications and petitions (and withdrawals once one is approved and the other is still pending!).
It really depends on the particulars of your investments thus far. For example, for EB-5 purposes, "retained earnings" funneled back into the business won't count towards the EB-5 minimum investment amount. You would have had to take the money out, pay taxes on it as income and then plunk it back in to the business for it to count for EB-5 purposes. There are a whole host of quirky things that would have to be addressed. You would need to have a sit down with an EB-5 professional to work through the details. NEVER withhold info from the person trying to help you! USCIS will find it later and in many instances, it could have been corrected BEFORE filing and CANNOT be corrected AFTER filing the visa petition.
You definitely need to consult an experienced EB-5 attorney and develop a strategy to accomplish your goals. If you file an I -485 application based upon the I-526 approval then the approval of the I-485 will lead to a conditional permanent residency.