Most of the credits that appear at the end of the film are fake. The crew was very small and, rather than repeat the same names over and over again, they decided to just make up names.
The film's budget was so low that the crew would go dumpster diving for discarded furniture and plumbing to dress the sets.
According to writer/director Frank Henenlotter, he was emboldened to make the movie because he believed that nobody would ever see it. He claims to have been 'horrified' when it became a success. More than thirty years after its initial release, it remains a cult classic among horror fans.
Frank Henenlotter admits that he didn't really know what he was doing while making this film as it was his first feature-length directorial effort. As such, he actively experimented with the tone: if a scene wasn't scary, it could be funny, and if a scene wasn't funny it could at least be entertaining for its shock value.
When Duane checks into the Hotel Broslin, he takes out a wad of cash. According to director Frank Henenlotter, that money was the film's entire budget.