I had the same problem- Morrow Audio wouldn't make me a XLR cable long enough and I was getting into $10,000 territory with a custom set of Cardis. Since I'm not Elon that option got downvoted.
I read the PS Audio DIY article here: https://www.psaudio.com/blogs/copper/how-to-make-a-50-high-end-xlr-interconnect/
I have made up a number of sets of these since my first try. I cannot tell the difference between them and my $600 1M Moro Audio XLRs. Yes, if you have a real listening room fully treated with bespoke gear and outstanding source material plus a golden ear you would be able to tell the difference between the Mogami DIY stuff and the $10K cables.
My argument is that in a home stereo setup playing in a room with kids, dogs, furniture, Christmas trees a month a year, etc. the Mogami setup in that video is indistinguishable from the multi-thousands of dollar cables.