Our model Class B (Leisure Travel 210B 3S) sleeps three, two on fold out sofa in the back and one using the passenger seat rotated with a folded down 3rd seat behind it. I have slept in the front seat for two separate 6-week trips with teenage grandsons on the back sofa. But I am 5' 6", any taller would be tight.
But you would probably be hard pressed to find one used.
Our overall mileage for 135K miles is 20.3 MPG which includes all kind of terrain including many mountains and my heavy foot. It's the 5-cyl Mercedes turbo diesel.