Well other than your workstation advice, your insistence on never building oneself is similar BS. So, speak for yourself mate.
Au Contraire.
I built one myself just for the experiencem but never inteded to use it in trading. Didn't save much money. Wasn't worth the effort. Had issues. BIY for a trading rig is completely unecessary and devoid of financial or functional value*. So... I pass the results of that info along.
* I understand... that BIY-ers are like arguing religion.... DAMNED convinced they are right, but not.