Ive looked into this somewhat. It's worth it if you have a lot of LEDs to drive OR you can build the pcb yourself.
Otherwise (especially if youre having some place make/send it) not really, it'll be a lot less involved in time and funds for 1-2 pcbs.
You are right. "Economy of Scale" will not work for smaller led builds, especially, if you have unneeded boards leftover, that you're unable to sell. But the costs of having them made by a board shop vs. purchasing all the needed parts( copper clad boards, etch-ant,tin-plate,tools, ect..) gets pretty close, without the mess.