Rental Car saga

I’m not sure if when he tells me the price it’s per day, per trip, or just what it came to for the hours they had the car. I know they usually leave very early in the morning and come back either late at night or the next day. He has a group of about a dozen kids he explores with, so between them, there are usually enough cars depending on the combo of kids that are going that weekend. When there isn’t, he’s the next driver up and they end up renting through Turo.