Before you go too far down the 3D printed resin route, look and see if laser cut acrylic might work for your needs. There are services where you upload a vector file, and they’ll cut out a piece of clear plastic with whatever shape and thickness you need. At that point you just need to sandwich the pieces together and apply some fasteners.

Potentially take a look at Sling TV. They’re selling the same streaming TV service that YouTube TV and Hulu + Live TV are, but they’ve structured things slightly differently. They have a “Sling Orange” and “Sling Blue” package which roughly translates to, “Do you want sports or cable news?” They both have an 80% overlap of channels like HGTV and Food Network, but Orange has ESPN and Blue has CNN. If you buy both it costs about the same as YouTube TV, but you save a decent chunk of change if you can forgo one of the packages.

The only big catch is they don’t carry local stations. If you sign up for 3 months in advance though, they’ll ship you a network connected TV antenna that you can use inside the Sling app to watch local TV. It’s probably not the most parent-friendly solution, but it works for watching one or two event programs a year like the Super Bowl or a debate.

This is pretty typical for universities. They don’t want the airwaves clogged, doubling up NAT can lead to networking wonkiness, and they don’t want you giving university network access to unauthorized folks with an open AP.

When you say VR streaming, you just mean wireless from your PC to the headset, right? There’s a chance you could do that with an offline wireless router if the VR experiences you’re looking to play are single player.

I can’t help much on the power draw side of this question, but one thing to look out for with a UPS is some sort of communication option. (Usually NUT over ethernet, but there are some USB options too.) Most modern UPS brands will have a plugin you can install on your Raspberry Pi and Mini PC that allows your UPS to signal, “Hey, I’ve got 3% of battery life, you actually need to gracefully shut down now.” It’s mostly useful for NAS applications with spinning drives, but it could help save your Pi’s SD card potentially.

It’s a pretty standard feature these days, but the cheapest of the cheap will omit it.