Alumni Ventures Group’s (AVG) limited partners aren’t endowment or pension funds. Its typical LP is a heart surgeon in Des Moines, Iowa. The firm has both an unorthodox model of fundraising and dealmaking. Across 25 micro funds, AVG is raising and investing upwards of $200 million per year for and in tech startups. Tucked away in Boston, far from the limelight of Silicon Valley, few seem to be paying attention to AVG.