Hello dear @culgin.

How well you explained the whole process. I have knowledge of hardware assembly, but I believe that anyone can easily understand with your explanation.

This equipment is tiny in its physical dimensions. I see that the operating system is based on linux.
But it seems to me that the price is high considering that it does not offer peripheral devices.

I was unaware of the existence of these raspberry devices. 
One thing that doesn't make much sense to me is that they don't come pre-assembled and with the OS installed.

Thanks for sharing.

Your Friend, Juan.