There are multiple steps to the EB-5 process. It may take several months to prepare and file the I-526 petition. Processing of the I-526 may take 12-18 months. Applying for conditional permanent residency and attending the interview may take several more months. After 2 years of CPR, you can apply to remove conditions.
The process of preparing the petitions and applications for conditional permanent residency, may take 12 months more or less. The filing of the petition to remove the conditions before the two year anniversary may take at a minimum 12 months.