Restaurant owners will not appreciate you wanting to shut down their restaurant to make your budget movie, and they don't want their customers irritated by a bunch of cowboy film-makers either. Also note that anyone who appears in your film needs to sign a contract giving their permission to appear, so thinking you'll just include all of the passers-by isn't the answer either. Don't write your script specifying particular weather conditions if you can possibly help it. Special effects always take time and cost money. They will eat up whatever tiny budget you have.
Specific music is a problem.
Night-time can be expensive for filming because you'll need good lighting. If a scene is exterior and away from a power source, you'll need a generator. You can film night scenes in daylight with a filter but only if the sky never shows. Interior scenes can be shot day or night and you can often imply one or the other as needed, if there aren't too many windows. Of course these suggestions aren't carved in stone.