Here’s my small contribution to darkness. I built it in the basement. It is about 81/2’ square. It still needs ventilation and the “sink” is an old door on 2 chairs while the bucket serves as the temporary drain.

The wooden box is my home built VU light box for Kallitype and Palladium work.
I’ve got the Zone VI washer on a dolly and push it to the real sink near the washer.

The Beseler enlarger is set up with a Zone VI cold light head and stabilizer for contact printing on Azo and Lodima. It is bolted to the ceiling joists and to the work table. It is very sturdy.