To put it simply, if the trumpet player is not there, then the trumpet part cannot be played. Of course, the larger band will sound dead-on to the records, however, if your facility or budget will not accommodate a large band, then don't fret, the five piece can be a wonderful option for you. A typical job lasts four hours. However, the Neons can and will accommodate you whatever your needs are. Daytime events, in particular, seem to work better at the three hour range.
Cost depends on many factors.
As you can see, it depends. Please call for an exact price quote. Like all bands, the Neons take breaks. Typically, three 15-minute breaks in a four hour event. However, the Neons will work their breaks around your schedule.