An Actual Attempt at a B Movie The best way to make a good B-movie is to set out to make a good movie...and have a bunch of unintentional shortcomings.
Better still, follow Roger Corman's model--he can make a good movie on a shoestring budget, and it'll still carry that B-movie label.
Let's just call this what it is. An independent art house type movie that is a 21st Century version of early 20th Century experimental films.