HD signals streaming live TV

I have a situation similar to another recent post, but it's a different enough problem I thought I'd ask..



Here's my issue. I have an office with 5 HDTVs all on a video wall together. They're all going to air live news on different channels. I have the main TV hooked up to Tivo Roamio Plus, and I thought I would just split the cable to the other 4 TVs - but I've discovered that those TVs only show SD programming, not HD without a cable box for each one. So, I thought maybe I'd get Tivo minis for the other 4 TVs so I could stream beautiful HD to them (different news channels on each). But I just learned that the minis "time out" after 4 hours of live TV, so perhaps that isn't a great solution either.



So basically, I want HD on 5 TVs all next to each other all on different live TV channels.

Any thoughts on how to do what I want?

If I set up all the minis to record a show every four hours, would that be a good work-around?



Thanks to all.