Actually, it's darn close. Page 4 of the spec sheet says 102 lbs in cabinet for 16-track.
www.dvq.com/hifi/images/stephens.pdf
Remember, unbalanced +4 audio with no transformers. Electronics are tiny, installed right on the front of the transport behind a pull down front panel. The first 100 or so machines were modified 3M transports, but then 3M got tired of him outselling them, so he had to make his own.
Of course, for portable use, he would package the transport in one portable rack box and the meters in another, not in a console. The machines can even run off 12VDC so you can use a car battery.
Price is pretty high, even for a machine in such good shape.
Cheers,
Otto