Why rent? Instead of owning a minivan, we've rented for family vacations. All of us drive. So instead of taking two cars for the five of us and having a 20 something drive, we'll rent a van.
I think the last van rental was in 2013. Went to DC from the STL area, so the mileage was similar to the Maxima. Cost was higher at over $700 for 10 days. But still cheaper than airfare for 5 and then renting something large enough for 5 with luggage at the other end.
So instead of owning a van that we might use a few times a month, we rent one for the summer vacation and then each drive our paid-for cars for work, school, church and other local fun.
My youngest is 16, so everyone is going a different direction. Other than Sundays to church or a dinner out, seldom are we all in the same place at the same time. Even then, invariably, someone has to go to work, a class, or some other event. So two or three cars may show up at a location because we are going to or coming from different places.