I've been thinking about this level of custom PC for years. I've put it off for a long time because I knew I didn't have the tools necessary to cut the amount of metal I would need. That has changed recently when I found a very reliable guy with a waterjet machine at RCCwaterjet.com This time I needed one dozen 15 inch square "frames" with a two inch border all the way around I then picked up 48 one inch steel spacers And four drawer pulls Besides the dozen frames, I got one complete square for the base My 9-year old daughter has been wanting to help for a long time, and this seems like the best project to give her I had her feed the threaded rods through the base and into the drawer pulls Then we starting sliding each frame down followed by four spacers, and then another frame, over and over Till we ran out of frames Then I cut off the excess threading Now the outside is done
Threaded rod like that gains quite a lot of stability with each layer you add in. Usually 3 layers will make a surprisingly rigid structure. With 15 . . . I don't think it's going anywhere I have a table/computer case here that I made with 1/4" rod and 3 wooden plates, and I could jump on the thing without it budging. Looking like a really interesting build, can't wait to see where you go with this.