PC prices are crazy right now, but if you can find a used Lenovo ThinkCentre, I’d go for that.

I’m running an m720q and it’s neat because you can get a riser board and install an extra PCIe NIC of your choosing.

If you don’t want to go that route try to find a mini PC with 2 intel NICs, since they’re historically the most reliable and well supported.

Depending on the firestick you may be able to jailbreak it.