Blog:Why good lowest-budget movies are very rare ?

Most lowest-budget movies that was very cult-following are Plan 9 From Outer Space,Birdemic 1 and 2,Foodfight!,and Manos: Hands of Fate. But Who Killed Captain Alex? is one of the few low budget movie that was very good so i just wanted to ask,why some good lowest budget movies were extremely rare to make ?