Yeah, $60 is a bit much. At that point I'd probably just purchase a new Edge with all-in service.

I did pick up this one off of Amazon for $5, but it didn't seem to work. https://www.amazon.com/dp/B00M77HMU0

Heads up, the Amazon Basics USB 3.0 Gigabit Ethernet Adapter has the AX88179 chipset and is confirmed to work perfectly on the Switch. It's a simply plug-and-play installation. Just make sure you get the USB 3.0 version and not 2.0 and you're golden.

And FYI, the AX88179 chipset actually has a 2-3% failure rate in the first 6 months so no matter what brand you get, you have a small chance of it dying on you in the first year. So I recommend the Amazon Basics one simply because of their customer service. You know Amazon will gladly send you out a new one no questions asked with 2 day shipping if yours stops working. It's also the cheapest of the bunch as well so that's another plus.

As others said, the ethernet port is 100 Mbps but I used this adapter and get my 345 Mbps download speed. The usb-A port is 2.0 so the most you will get is about 480 Mbps give or take. I probably won't use the usb port for anything else so it works for me. Not sure it even matters but that 100 Mbps limit was a bad decision on someone's part.

https://www.amazon.com/AmazonBasics-1000-Gigabit-Ethernet-Adapter/dp/B00M77HMU0/ref=sr_1_4?ie=UTF8&qid=1550115154&sr=8-4&keywords=usb+to+ethernet+adapter

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:)

1. put a linux box acting as a router, it needs more than 1 ethernet port, so I think your NUC need a USB network adapter such as this one. https://www.amazon.com/AmazonBasics-1000-Gigabit-Ethernet-Adapter/dp/B00M77HMU0/
2. the overall diagram of the VPN tunnel enabled router should be like this:
   internet <----> ethernet 0 of the linux box <----> WireGuard Client running on the linux box <----> ethernet 1 of the linux box <----> any decent wireless router acted as a wireless AP
3. The setup of the linux to make it a router should be like running some command. take a look at :
   https://jjasghar.github.io/blog/2020/02/14/centos-8-as-my-new-router/
4. Running WireGuard on a linux box as a VPN client is straightforward and well explained at the WireGuard official website, read it to start.
   
5. if all you need is to watch streaming content on a TV box such as Apple TV, Google TV, Fire TV, Shield TV and Roku. It was recommended to use a wireless router with openwrt installed to running an WireGuard tunnel on it. If you have no more than 5 members in your family, A Linksys E8450 can serve you well which can support the tunnel speed of more than 300Mbps.

would something like this work to hook the TPCast router to your computer?

AmazonBasics USB 3.0 to 10/100/1000 gigabit Ethernet Adapter