I started the Blackbox BOM, i don´t know whats the best way to keep track of all the Items but until now im using a google docs excel sheet:

https://docs.google.com/spreadsheets/d/1L5v7SuMWrlGfRz0OFCthQMxkcMX9GIYf3i2thz9PU30/edit?usp=sharing

The Price (Without Acryl Housing, Screws Nuts and Watercooling) should be around 1400€. 

Yes, this is not a cheap Printer but it could be dropped way down with cheaper retailers. If you want to collaborate on this BOM just contact me.