Ed, a simple boom on a stand with casters and a longer hose sounds like a solution. One home made sky hook deluxe. And for that dragging power cord? I use a portable IV hanger. This is just a 5' tall post mounted on casters with a "U" shaped top. This also works great for air lines, you just put the cord or line in the "U" shape and it keeps it up out of the way. While we are being inventive wouldn't it be great to mount the boom on the post and have it all in one? The base would need to be heavy for stability but it shouldn't be too difficult.