I think it's 2 aircraft all week with a 3rd on Fri - Sun. It's certainly for first to base an aircraft at an airport for only some days of the week.
I wonder what it will do from Mon-Thu? Perhaps it will be a different aircraft every weekend where it flies out empty and get's maintained, where another will operate the next weekend and then that will fly out empty and go to a maintainance base, then another aircraft for the next weekend, flies out and gets maintained and so on...