As a general guide, we may recommend the E2 route to people with a minimum of $100,000 US to invest. In exceptional cases, United States Citizenship and Immigration Services will consider applications with amounts as low as $50,000.
The individual investor must demonstrate that their sole purpose for entering the U.S. is to run or develop the enterprise concerned. This is normally shown by their having either a minimum 50% stake in the business, or a significant managerial or leadership position that gives them operational control.
To qualify as "investment", it is necessary to show that there is a risk of loss of capital, and also that the funds have not been generated through illegal means, even indirectly. (For that reason, you cannot simply invest in real estate.) The investment can either be put into a new company or into an existing company; however the investment cannot be used to create a job solely for the individual investor. Our experience with these applications suggests that the business must employ at least three to five other people.
Any investment must not be viewed as marginal, meaning that it must have a good chance of generating sufficient income to provide for the visa holder and any family within five years of their entering the U.S. In addition, the business must have its own dedicated premises, so cannot be run from the investor's home.