I think the printing industry is just inherently difficult to serve. Manufacturers can barely deliver quality products and support on the printers they make now. I can't imagine them also having to support all of these "custom" setups. I imagine a future where these custom printers you describe might exist, but in a centralized "kinkos" type store, or better yet a makerspace. There's a big difference marketing and selling to a consumer vs. specialized industry.