You may be able to adjust your status to Conditional Permanent Resident from the US once your I-526 Petition is approved, granted you are in legal status in the US upon I-526 approval. Otherwise, you can proceed with Consulate processing in your country. Arranging a timeline and planning for your entry to the US is best served by retaining an experienced EB5 attorney, like those at our law firm.
Your question suggests that you are now living outside the U.S. The I-526 can take, on average, anywhere from 3 to 6 months to be adjudicated [BUT the processing times are likely to get shorter and shorter--it depends]. Once the I-526 is approved, you must file the DS-230 with the embassy or consulate having jurisdiction over this process for the place where you live such as Guangzhou in China. The interview will be scheduled in accordance with the workload, staffing, and resource constraints of the Consular Post. On average perhaps you MIGHT get interviewed in another 3 to 6 months. Suppose that all goes well, the State Department still has to manufacture the visas for your passports (let's be optimistic and say that you get them back in one month (or Less)). The visa is valid for 6 months which means that you have six months to travel to the U.S. and get processed by CBP for you greencards. The principal MUST precede or accompany the dependent spouse and children. The Dependents MAY NOT enter BEFORE the principal once visas are issued. That said, sometimes a child might already be in the U.S. as a student and may adjust status AFTER the principal enters the U.S. on their immigrant visa.
To obtain conditional permanent residency so that you may live and or work in the U.S., the first step of the I-526 petition must be approved and then US.Consulate processing for the issuance of the Conditional Permanent Residency.