Seems like not a lot of people have Dobsonian telescopes in their POD observatory. Given the 4′ high walls, the POD does limit what you can see from a Dob on the horizon. However, as I live in Toronto, my horizon is fairly blocked off by trees and houses anyways.
To get the most out of my limited views, my Dob is mounted on a dolly. Basically, its just a piece of 3/4″ plywood with some 3″ castor wheels screwed to the bottom: