Would a set of furniture sliders work? I've used them on some taller pieces of furniture and they worked well for me. I've used both the long ones and the shorter (about a foot) where you put them under each corner. I don't think they are very expensive, I've had them so long I wouldn't have a current price.
The short answer is no. I have the new 200 lb beast on a dolly so moving that into place won't be hard. But the TV needs to come off an old stand and the old stand, likely 120 LB or so, need to go downstairs to and out of the way.