Can't fault the craftsmanship...but. As you said, no electrical. I get they don't like technology, or have a prohibition against it. That being said, putting in conduits to metal (electrical boxes) that run in the walls to a central metal box should not be against anything. Then access for plumbing and insulation. Otherwise, not worth all that work to the rest of the world. Were you to purchase one, you would need to destroy the interior to install the utilities.
