Just on the Lightbridge base, a lot of that 30 inches is unnecessary. You can remove the two base circle pieces and instal a squarish piece to pick up the alt supports and a roughly 24 - 26 (from memory) inch circle baseboard. The lazy Susan bearing is a lot smaller than that and does all the work. A couple of wheelbarrow handles and wheels and no worries you're through the door and observing before you can say " sweet ".
My Lightbridge I replaced the entire base with a plywood one. Not very hard to do a cheap handheld router will do most of the work if you use the original pieces as a template. Much lighter and easy to set up. I just wheel it in and out of the back door.
