Mine, like the one shown above, is something like sixteen feet long. There are also smaller models that run more slowly but have all the features. With two people, we run ours at about one-third of its rated speed, but the candler section is broken and we're candling by hand. These machines are still being made, so you can buy one new. They've been made for decades and are very rugged, so you can buy one used.
Parts are still available for almost everything.
The oldest grader mechanisms no longer have parts available, but if worst came to worst you could buy a new grader section and bolt it onto an old machine.