Small update:
Thanks to everyone, giving me support and helping me with this project!!!
I'm currently in the phase of gathering all the components and making a price estimate. All small bits (screws, standoffs, electrical components) are pretty much in the range of $20-25.
The PCB is another big part. 50% of you (so far) like the idea of custom PCB text. I will talk with a supplier and probably will get a custom silk version for $20-25 too. Ones who don't like the idea of custom text can leave it empty and get a small decrease in price (am not quite sure how much, but it's probably around $2-$5).
I really want to get this project up and running for less than $380. At the time of posting I only talked to one CNC supplier, who offers me a kit of 25 for like $330 each, however that's only for the Black version. Silver, gray and e-white where loved options too, that's why I have to try my best offering you the best I can. The problem is, that I don't know how much of which kind I can sell, making the estimate hard, because I want to give you the most accurate and less expensive option, so we can all be happy.
Hope you have a great week,
Lord_Rabel