"See https://www.amazon.com/Beelink-Intel-2-9Ghz-USB3-0-Type-C/dp/B09J4D6TMG/
I am trying to determine if this is a good choice for the hardware or not?" The Opensense Hardware Sizing document is a good place to start. https://docs.opnsense.org/manual/hardware.html It's the second result on a Google search of "Opensense firewall hardware".
