The goal of an E2 visa is to live and work in the United States for longer than 6 months and shorter than a decade. It is a temporary solution that requires a "substantial investment", typically $250,000 USD but the definition of substantial may vary by country of origin.
To qualify for E-2 classification, the treaty investor must:
Be a national of a country with which the United States maintains a treaty of commerce and navigation;
Have invested, or be actively in the process of investing, a substantial amount of capital in a bona fide enterprise in the United States; and
Be seeking to enter the United States solely to develop and direct the investment enterprise. This is established by showing at least 50% ownership of the enterprise or possession of operational control through a managerial position or other corporate device.