I'd suggest the approach of buying a ton of ******* and fittings.
I would be very afraid of bending black pipe.
A ton of fittings is a problem. I plumbed a Buds 30x40 auto shop with 90 ft of pipe and about a dozen fittings, maybe another half a dozen in drains all common elbow and T.
There is nothing wrong with bending pipe but it makes it hade to tighten leaks due to the fact it has to be indexed. Part of this is the reason we see so many leaks. Guys on ladders trying to tighten clusters of fittings, I agree that they may be cheap and it probably doesn't help but they never get tight or loosen along the rest of the install.
600 did a good install, the learning curve is really hi in something like this as most people don't get to do it often enough to relax and lots are done so occasional.
I done as many wrong as right, maybe more, still fixing them on occasion. Today I really try to copy the masters more than improve on them, I doubt the plumma has a bender on the truck
In the end it works and will repeat the learning curve is hi but its worth noting that different techniques for different material. There is often no net loss to bends with simple electric and some pipe.