This is my first post here i hope this is the right subreddit to post this.

I'm looking for a firewall/router to build a sub network on which i will use Tailscale as a subnet router running on OpenWRT.

I need to have 2 WAN ports for internet failover. Internet connectivity will be provided by a 4G modem or a ISP modem/router. I do not need super fast internet, as it is mainly for remote monitoring and management of the services running on a small server in this network, but it needs to be stable.

I have check the NanoPi R5S and it looks processing. How would it compare to an intel based mini pc like this one with an Intel Celeron N2830 and 2GB or 4GB of ram in the same price range <120 USD?

Did i missed other interesting hardware?