[Retr0id]

You can get boards like these made for single-digit dollars per unit* even at prototype scale, through companies like jlcpcb.

*I haven't looked at the specific parts for this board, the LEDs look nice and could be a little pricey.

[rwmj]

Boards, but can you get the pick and place and the soldering done? I wouldn't want to be soldering that many LEDs by hand!

[mk_stjames]

Every major chinese PCB supplier has offered very affordable PCB assembly ("PCBA") for several years now where you give the gerbers for the boards along with a BOM with part numbers from a mutual supplier catalog and p'np / solderpaste mask data and they will load up a p'np machine and oven run a small batch of boards for you.

e.g.:

https://jlcpcb.com/smt-assembly

https://www.pcbway.com/pcb-assembly.html

[Retr0id]

That price is including PCBA. Without it would be <$1/board