I love the ones built from salvage or bought at fleas for the basics. Here is my take on building. Boxes can be had for a grand or less, good ones, I don't recall but that HF or General, whatever it is, super nice for the price. If I was considering a scratch build and comparing it to a 8 or 10 grand box off the truck it would push me to build, one guy in one of the threads said,, 12 days or so, ok, 2 or even 3 weeks, even a grand in materials etc, still a couple a grand a week for the effort.
Be well worth taking off work to build it. In reality would likely be looking over the economy line. You could somewhat compete against the hi end doing a build but not against the low.
The first, a box I pay 75 for, is heavy but I am not in the drawers like a madman. The second, storage for tools with occasional use, extra extras, some specialty sets, we can get if needed but out of the way and out of general circulation. 3rd, old boxes, specialty tools, most we built, pullers, specialty tools we cant lose. A 10 grand box wouldn't help any one of these schemes.