Until you obtain your conditional permanent residency through an EB5 process there are other legal ways or alternatives to stay in the U.S, and to live and work here. Depending on the country you are from you may decide to obtain E-2 or E-3 status or H1-B status.
You would probably want to make the investment while you are still in status, or return to your home country from where you can invest in the new commercial enterprise in the US. From there you can proceed through consular processing. Based on your situation, we recommend retaining qualified and experienced US Immigration counsel, like the attorneys at our law firm, to assist and represent you.