Co-investment groups transform diaspora investing: instead of one person risking $50,000 alone, ten investors contribute $5,000 each, spreading risk while accessing deals requiring significant capital. At 2024 Nigeria Diaspora Investment Summit, 236 investors pooled ₦673 million across 50+ businesses. This guide covers: recruiting 6-12 members from trusted networks, establishing legal structure (SPVs, Limited Partnerships, Investment Clubs), pooling capital with clear criteria, evaluating opportunities through rigorous due diligence, and executing investments with active management.