You don't need to overcomplicate your setup. A HDHR Prime (if you need DRM'd channels then maybe a HDMI encoder too and a couple of android tv devices), a mini PC with a good GPU (those are very inexpensive), and maybe a wifi router or a PoE switch if you need more ethernet ports will do.
Obviously for the Primes, you'll need to get more cablecards and to get a coax connection to your Primes.
Just make sure you make some space in your house and keep cooling fans (or just fans) in handy on hot days because all of that can get hot








