Want to build my own equipment.

It is a very deep pond you wish to jump into. Build it and they will come. Or you may end up with a lot of expensive boxes to deal with.

Good Evening!

I want to win a match with Tyson!...

As a subset of this thread, does anyone know any "high end" metal fabricators that might supply the industry or otherwise be available to make a chassis for a custom amp, preamp etc.

Check the net, Check the net, and once again check the net.

If you want to build amps, check out barns and nobel's online service.
I got some very good amplifier construction manuals from there, cant remember the name off the top of my dome tho.

Just go there and look for books on loudspeakers or amps, there are plenty that will give you some excellent knowledge.

It doesent really look difficult either.

Custom metal cases?
Once again i would just search the net. Look for any type of Metal Fabricators. Certain you will find something that will suit yer needs.
As far as "High end" goes, im not sure metal workers will understand what you mean by high end, but if you tell them what you want im sure they can fab it for ya, and im sure they can make it every bit as good as say, a jeff rowland amp chassis