Actually, renting family-sized aircraft is typical. Not every family can afford the airplane 24/7/365. They are expensive, require constant upkeep & constant upgrades, constant maintenance. Move further from Grandma? Might cost less to rent a plane for the week & buy fuel, compared to driving, meals, and lodging plus giving up the travel time.
General aviation is generally separated from commercial aviation for everyone' safety. You may never have been in an airport with small planes for rent. Airports with flight schools usually planes for rent, because you have to practice. Required to keep that license, a certain number of take-offs and landings within timeframes.
In my family, we rented planes and also were part-owners of others. Three or four families pool resources & hammer out the vacation schedule.
There use to be a TV show about freight haulers in Alaska and northern Canada --
Flying Wild Alaska (TV Series 2011– ) - IMDb
The show depicted several of their pilots as -- well -- surf bums of the air. They could understand the aircraft & the weather and fly though most anything but weren't cut out for corporate life.
ETA: Maybe that was
Ice Pilots??? IDK
Maybe Beebo Russell saw himself in that picture?
YMMV