I'm planning to start a service which archives TV video content (at low quality). I'm exploring what hardware and video digitization equipment will be needed.

The TV channels in the geography I'm looking at are unencrypted and are provided through coaxial cable wires (similar to standard 'Cable TV' in the US).

There are about 200-250 channels, each of which is to be digitized and archived. I'm looking for a cost-effective, scalable solution which can be scaled up from an initial set of 5-10 channels to a max of 200. I'm not sure how TV tuner recommendations which work only for 3-4 channels at a time would scale up cost-effectively.