Reddit mentions of NavePoint 1U 19 Inch Vertical Wall Mount Rack Wall Mountable Server Rack w/Hardware Black

Damn I didn't see the second and third pictures duh! So if you use that panel I showed you from amazon (or one like it, there's a lot of wires there) this may be a better choice.

https://www.amazon.com/TRENDnet-Unshielded-Wallmount-Compatible-TC-P24C6/dp/B0000AZK72/ref=sr_1_7?keywords=patch+panel+wall+mount&qid=1550278079&s=gateway&sr=8-7

This panel will work with cat5 or cat6, I can't tell what type of wiring you have there but you'll need that

You'll also need some way to mount it on the wall, I used one of these:

https://www.amazon.com/Tripp-Lite-Hinged-Bracket-N060-004/dp/B000E887XU/ref=sr_1_4?keywords=patch+panel+wall+mount&qid=1550278079&s=gateway&sr=8-4

Now with the patch panel, you don't need to put ends on the wire. You use a punch down tool and they go into little clip type things. It makes more sense if you look at the pictures. Here is a punch down tool:

https://www.amazon.com/TRENDnet-Punch-Krone-Blade-TC-PDT/dp/B0000AZK4D/ref=sr_1_5?keywords=punch+down+tool&qid=1550278185&s=gateway&sr=8-5

you're gonna need some patch cables to run from the patch panel to a switch. You're also gonna need a switch down there to connect all the ethernet cables together.

To mount the switch, you're gonna need a rack mount (to look the nicest, and a 19" rack switch).

A nice mount I used is this: https://www.amazon.com/NavePoint-Vertical-Mountable-Server-Hardware/dp/B01M151AOJ/ref=sr_1_4?keywords=vertical+rack+mount&qid=1550278400&s=gateway&sr=8-4

and then a switch, something like this (which I picked more or less at random) https://www.amazon.com/Linksys-LGS124-Rackmount-Unmanaged-Enclosure/dp/B00H1OQBLA/ref=sr_1_3?keywords=rack+mount+switch&qid=1550278467&s=gateway&sr=8-3 will do the job quite well. It's a gigabit unamanaged switch. You can spend a lot more if you want to, but this will probably do the job.

So from there, you need a cable from switch to that box in the first picture with the ethernet ports on the back.

That will give you wired internet in the whole house. Adding access points from there is trivial.

I know it's a lot of information, feel free to ask anything.

Edit: That verizon box in picture 3 looks like it might be more than just a modem, it might be a modem/router. If that's the case you can plug that into the switch. But if it's just a modem, that won't work even tho the ethernet port will physically connect. The best way to tell is that if it only has one ethernet port, then it's just a modem, if it has more than 1 then it's a modem/router.

I have an L-shaped desk, and the part I want to use is the section to my left, I don't actually put my legs under it often. It just holds my keyboards/mixers.

Yeah getting the brackets right might be somewhat tricky, but 1U racks are 1.75" thick, so I could potentially just get a 2" bracket and line it with rubber or something to fill the gap. That shouldn't be too difficult.

I'm just really surprised there isn't something already out there that does this. They do make some vertical rack mounts that are supposed to be attached to walls, which might work for my purposes, if I get one in the correct configuration.

NavePoint 1U 19 Inch Vertical Wall Mount Rack Wall Mountable Server Rack w/Hardware Black
https://www.amazon.com/dp/B01M151AOJ/ref=cm_sw_r_cp_apa_i_5BTWDbR8K3KXZ