ok well also this project doesn't make sense at all, even at 30 pieces just the esp32wrover+usb serial are as expensive as https://www.aliexpress.com/item/1005001621990623.html
which is already really space optimized, as a general devboard module. pcb + usb-c connector + other parts + shipping on top that for what, black soldermask and some custom squigglies perhaps?
doesn't this look great? sucks castellated holes are so damn expensive tbh (like, €33.12 surcharge for castellation, €13.76 surcharge for ENIG gold plating) and then add component cost, and panelizing will be difficult too because of the castellation...
oh right, fuck, they don't even do SMT on black soldermask + ENIG