With less than 8 players one goal is enough to train. Training fits in 1/3 of 2 lanes leaving more space for others to swim and more money in the club's pocket.
5 tips for coaching small teams
Let me remind you, that most training guides assume a full team training at regular times in a proper diving pool, with a coach on the surface. Furthermore, they assume that all individuals within the team coached share the same goals such as being champions. But few teams start like that.