I'm looking to connect my PC in my home office to my living room TV. Right now I'm looking at unpowered usb over cat5/6 and powered HDMI over cat5/6. Both of the adapters say they're good for ~150' and I'd be doing a 40' cable run with pre terminated cat6. Cost of about $70 for adapters and cable on amazon.
I've wired a garage and build my own PCs so I'm not afraid of the install but I have basically no networking experience. I'm aiming to play single player games from my couch and I don't know if something like this is going to be an enjoyable experience or if there is a better way without breaking the bank.
If you have money so spend, you might want to look at optical thunderbolt. Linus from LTT uses it to have his PC and all the noise and heat in another room.