Since when do companies or manufactures give a cost breakdown of every component in their product? I don’t know of many nor would I except that as a consumer tbh.
I can’t comment on the actual costs to source all the parts, produce, keep inventoried, sell and ship the speakers, which as you mentioned are comprised of lots of different components that presumably come from different places and vendors....but I do know it’s a one-man operation who builds the cabs to a very high standard, uses top shelf drivers, a unique crossover assembly that requires tuning by ear, real wood veneers, a high quality grill system and includes US shipping on a very heavy pair of speakers in the pricing.
Those attributes are some of the motivation that pushed me to purchase directly from John rather than buying a used pair at the time which would’ve saved me almost a grand. I like supporting certain makers/producers when I can.
I’ve never heard the BMR monitor but I’ve been thinking about buying pair for my dad when we update his system as he downsizes later this year.