Good morning @Mofosheee.
You come from the country that has most of the table builds and kits, i have built my own with the electronics package from your end of the woods, I have some pics here on this forum somewhere. You ask 'table concept' what is it that you are after exactly, is it just plasma or is it a multi function machine 'plasma router, flat bed mill'. Do you actually know what is involved in building one from scratch?, are you good at actually building something and seeing it to completion, and the software, the software to drive everything, from drawings right down to the CAM software to drive the machine. If you have never done any of this before then think hard DO I ACTUALLY WANT TO DO THIS. Please don't get me wrong, it is a very rewarding feeling bringing something of this caliber into operation, but it has it's heartaches, just saying. I am very happy with mine and it is producing some great results now, after some getting used to it and getting setting that it likes. It was a very STEEP learning curve, i thought 'how hard can it be.
The build was the easy part the learning of the software's (there is more than one) and how they all go together was the hardest for me.
Anyway welcome to the forum, there are some very skilled and knowledgeable people on here that are very willing to help, good luck.
In my recent experience there is enough learning to master with CAD packages, Sheetcam and Mach 3 (or equivalents) to keep you occupied without designing the build. As Henry said the USA seems to be awash with lowish cost plasma table kits.