I think it is best to go back to the drawing board with this and come back with a more flushed out idea.
For starters, just after looking at your renders you don't seem to have actually implemented any screws into the design. As a big FYI here, you need screws to put the board together, unless you're thinking of magnets, which won't be able to hold that massive bottom together with the case top.
(Also haven't seen a USB port in any of the renders - but I am going to give the benefit of the doubt in that it is somewhere on the rear of the case top that we just can't see from the render angles provided)
For the flex cut in your plate, I would suggest moving the top most cut above row 3 rather than keeping it below, as not doing so can result in pretty inconsistent flex - this isn't me just talking out of my ass, but out of experience testing flex cut positioning on a range of formfactors.
In regards to your estimated pricing, I implore you to just delete that section right now. You evidently have no clue how much these units will cost as you put a mere 40 euro price difference between a brass bottom vs alu bottom board, in which just by looking at the design, that would be massive f*cking piece of brass. Estimated prices are generally better once you have a good idea as to what your board would cost to machine plus hardware/packaging/PCBs/etc.
There are a few things that I personally am not fond of with this design, but that is not my place to say.
Please take this back to the drawing board and spend some more time on this project to push it in the right direction.
GLWIC
Kind sir, thank you a lot for your comment. To me, this is the most constructive feedback we're gotten so far.
You are right in so many levels.
We'll get back to you on the plate matter, if you don't mind giving a little hand.
Yes, the screws are missing, even though we're doing our best to keep as many hidden as we possibly can (we probably can't go as far as getting no screws visible, but we sure we'll try).
And you're right, the usb port is on the top left, and also hidden in renders.
Regarding the biggest issue you addressed, the pricing, we were working with some quotes we were given, including packaging, all the metal parts, CNCing, etc, etc, but it has come to our attention that we forgot a couple variables on the equation and therefore, thank you for imploring us to delete the price 😂
We will take the board for a "couple of rides" before updating you guys on it and hopefully we'll have some protos soon.
Thank you very much for your comment, it was an eye opener in so many ways and you gives us the will to continue improving until we find a sweetspot for the most part.