DIY, only regret was the case I used. Silverstone CS351. Just don’t. Its a massive pain to work in, and getting to the lower internal two HDD bays requires tearing the whole thing apart. I picked it because it would hold everything I was using without mods. Its just a pain to work on.
I was mainly interested in the chassis, and put my gear in it. When I seen the price, I was less excited.