U-verse TV routing questions

Hi

I have AT&T fiber running from a BGW320-505 in passthrough mode to my UDMP with a USW-Pro-24 and everything works fine for me. The BGW320 is set as 192.168.2 and the UDMP main lan is 192.168.1 with a couple of other networks configured for vnc and vlans. My U-verse TV is connected directly to the BGW320 and works fine as well. I have ethernet run from my network room to all the other rooms of the house and they also ran coax from there to 3 of the rooms though I never use that.

Everything is running fine but I'd like to be able to move my U-verse TV boxes to some other locations but with just one ethernet cable run to the other rooms that is an issue. I've had a few ideas and wanted to get input from people on them before doing down one road or the other.

Ideally I could have a switch that connected both the BGW320 and my UDMP to the one cable run and another switch at that end that would rout the two networks to the correct devices but don't see how I can configure that. Can't have a network on the UDMP set up for the 192.168.2 traffic as it sees that as its WAN address space.

So considering some other options. 1) ethernet to coax adapter and just use the 3 coax cables but be limited to the three rooms with it, 2) ethernet to wifi adapter to connect the boxes up the the BGW320 wifi or 3) powerline adapter to connect the boxes to the BGW320.

Any thoughts/comments on the options or other suggested solutions?