I can't match that, but here's my own worst.
In college, where I first learned darkroom work, I got spoiled by having the use of real darkrooms. But eventually I graduated and lived at my parents' home, where there wasn't a darkroom. I could acquire film developing tanks and trays OK, and I had a used Speed Graphic with one lens, so I bought a "Graflarger" kit, which consisted of a copy stand for the SG and a cold-light head with slot for negative that went on in place of the ground glass. I covered the cellar windows as well as I could, but did all my processing in the evening, when I could have what a friend called "free dark." There was electricity available and a laundry sink with hot and cold running water (luxury!), but my temperature control consisted of poking a finger into the mix to see if it felt about right (later I invested in a thermometer).
My biggest triumph in that "darkroom" was printing two humungously huge prints (for those days): 16x20"!!! Of course I had no trays that big, so I developed them by putting the exposed print on a relatively clean part of the concrete floor and sloshing it with a large sponge soaked in Dektol. Once it looked pretty well developed, I sloshed it for a while with fixer on another sponge. But they were too big to wash in the laundry sinks, so I had to carry the fixed prints up to the second floor to wash them in the bathtub. Amazingly, after fifty years the two prints are still in fine shape, no yellowing, fading, or fixer stains.
My present (unused for several years, alas) darkroom was built largely by a commercial portrait photographer friend who also had professional carpentry skills. I assisted him in building a room in our basement, including framing, sheetrock, electricity, and plumbing. I had by then built a 3'x8" sink of marine plywood, coated and sealed with Epoxy, and I had been given a thermostatic mixing valve by another photographer. Much different and vastly more efficient than the earlier one.
Eric
P.S. The image you posted could use a little spotting, but looks good otherwise. I'm looking forward to your piece in B&W.