If I walked into a studio and saw that lighting rig I would turn around and walk out. Not because it was a DYI project but because it is a fire-hazard and a major safety issue. it has nothing to do with being "professional" in terms of the gear, but as a "professional" i think the safety should be a higher priority than just saving a few bucks. Granted I have used my fair share of improvised lighting and a few DYI things that pushed the limit, but never that far.
I do see where he is coming from, but at the same time you get what you pay for. Pro-series gear is serviceable; most consumer grade stuff these days is disposable. Over the long-haul you'll save money since rather than replacing gear you can get it fixed. And yeah, there are a lot of DYI stuff you can make and use once or make and leave in the studio however, going back to the difference between pro and consumer grade gear, pro level gear is built to travel and built to last. I doubt if he had to shoot "on location" he could pack up the light stand and take it with him. I am not even sure I would want to touch it let alone even breath near it.
My bro (also a pro-photog) and I have done a lot of shooting just with flashes and remotes. Rather than drop a few grand on pro lights he picked up a few used flashes and some remotes and can get pretty creative with them. Not only it is a cheap DYI style of lighting but it is also SAFE and still looks "classy" --- at least when compared to a bunch of lights bungied together.