No FlexCars @ PDX?

Just seems like a weird oversight that there are no FlexCars at or near the Portland Airport. Maybe even several cars.

For example, I have an international flight leaving at 6:00 AM on Saturday, and it would be nice to reserve a car at the airport the night before, take it home, and then return it around 3:30-4:00 AM, giving me plenty of time to check in for my flight.

But I can’t. No FlexCars at the airport. Just seems weird.