I've owned a Chinese flatbed since 2011 (Docan). Technical support is limited but we do get some help through Teamviewer even still today without a service contract. I believe we spent 35k and that included on-site install and training. The lack of on-site support after install is the biggest issue. Also finding parts is time consuming and crucial parts, such as carriage board and main board are no longer supported and cannot be found. No schematics either, which makes electrical work even more difficult. This was my first printer and we weren't too reliant on it and so issues that would take a couple weeks to resolve were not so important, we could afford for it to be down.
Over the years, I've changed from Chinese parts to Western parts for consumables such as air/ink pumps, filters, UV lamps, and inks, and noticed improvements to where machine is more reliable in day-to-day printing than anytime prior. In the end, the prospect of one of my boards going bad and more reliance on the printer today than 7 years ago is why I've just purchased an Arizona 460XT. I can't afford for the printer to go down for any extended period of time. Also, with a larger userbase, the Arizona has much more support and any issue you have it's most likely someone else has already had that issue and documented it online.
If your dead-set to purchase Chinese, then make sure you budget a good amount for spare parts, because they most likely will not be available in a few years. More of a personal decision and depends on the level of your business. Expect the machine to not have any resale value as well. My machine is supported by Caldera/Onyx RIP, most Chinese printer aren't. I would take that as a positive sign when searching. At least find a Chinese company with track record. Have you considered a used Western build?
Agree, hardly any savings getting a smaller bed, and speed will suffer.