Who’s doing the case? Who’s doing the buttons? Who’s gonna put it together? Testing? Programming? Flashing? How about handling returns? Packaging? Design for all of the above?

Well that’s the point of a DIY project, you are going to do it (if that’s the kind of project you want). I wasn’t saying you should build this thing yourself because the busy bar is bad, I was just giving some more data to the original commenter who said you can build something similar yourself for much cheaper.