John Carney doesn't want to work too hard on set!
Making movies isn't an easy task and we've heard horror stories of shoots that have been massively delayed, arguments between cast and crew and money issues which cause films to be shut down before they're finished. And that's not to mention mammath tasks like Peter Jackson spending almost a year just shooting the three Hobbit films.
For Sing Street and Once director John Carney, that's all nonsense. If he's going to commit to a film and to spending a month or more on a set with the same people everyday he want it to be something he really wants to do, and not a constant chore.

