Question on centralized DVR and clients/app on all TV locations

Let me try to lay the scenario out the least confusing way of what I want to accomplish.

My old home had an HDDVR with 2 genie clients using a standalone wireless bridge.  Honestly, the range on the wireless bridge was awful and I had to install the bridge in a middle room that didnt even use a client just to connect both rooms that needed signal for the remote clients.

My new home is larger with more TV locations.   I have a central closet where my ATT Fiber router is located, all Cat6 and Coax in the house home runs back to this room.

I'd like the satellite on the house to be able to have TV service if power is lost due to hurricane seasons and I can utilize my whole home generator to maintain service(unsure yet if ATT Fiber will be active if the area loses power).

With a minimal amount of research, it appears a Genie 2 headless (HS17) will serve my purposes for the DVR to park in my telco closet.  Can the client boxes on the TVs be connected via Cat6 or do they require coax?   If I tie the HS17 into the wired network, can the remote boxes use local WiFi to pull content?  Just looking for reliable, consistent service to the TVs.

I have enterprise level switch and will have enterprise level WiFi in the house shortly.