I tried the RPi for several months. It could not handle the burden of recording several shows simultaneously while supporting 2TVs, screening commercials, etc. It needed to restarted often. Rolling through the guide caused crashes if one stepped ahead more than 4-5 days.
So I bought an i5-based Windows mini-computer for about $350 and the above problems pretty much disappeared. Here’s a link.
Beelink GK Mini PC with Windows... https://www.amazon.com/dp/B092M91JSH?ref=ppx_pop_mob_ap_share
The only flaw now occurs if I try to scroll forward in the guide over 7 days. Perhaps once a month I might have to restart the computer.

