The cast of the Bellows Free Academy-Fairfax Dramatic Arts Ensemble’s presentation of ‘The Addams Family’ finishes a dress rehearsal this week. With a $20,000 budget, according to the show’s co-director, Jerry Bailey, the premiere of the musical opens this evening at 7, and will run until Nov. 8. The show Friday is at 7, with two showings Saturday at 2 and 7.  Tickets, which can be purchased at the door or at the school’s main office until 4 p.m., are $10 for adults and $8 for students.