Hi
I have recently gone with a server rack for my audio equipment and I am not sure if I will go the same way again if I had the chance.
Am sure you have done the due diligence but I will point out in case you missed it.
Most important, you absolutely cannot stack it as shown in that picture. The heat dissipation will not happen and some of the components will get cooked from the heat of the component below it.
Then comes the cleaning limitation. Hands will not reach between 2 components.
For all practical purposes, half the rack size from what it states in the specs.
Another point to think of, there are hidden costs involved here.
Once you get a rack, you will want castors, cooling (read a NOT a cheap bathroom fan)
Then worry about earthing.
Then each rack shelf is in itself expensive depending on load capacity.
Expect to spend close to 500USD all in all.
If you still want a rack, then check Amazon. Best is if you can get it built from local iron welding chaps.