Piper’s low-wing PA-28 Cherokee family — the Cherokee, Warrior, Archer, and retractable Arrow — is a natural fit for a partnership. The fixed-gear models pair forgiving, stable handling with simple systems and one of the largest parts-and-maintenance networks in aviation, so a group of newer pilots can share one without worrying about exotic upkeep. When a partnership wants to grow into complex or retractable time, the Arrow is the same airframe with the gear that folds; the six-seat Saratoga steps up when members fly with families.
The economics are what keep the arrangement easy. A shared Warrior or Archer is among the least expensive four-seat singles to operate, so the monthly-per-partner figure stays modest even after the hangar and insurance are split. Because the PA-28 is such a common trainer and first airplane, demand stays strong and a partnership can add or replace a member without much trouble — the airplane is as liquid as it is affordable.