Turris Omnia router is a open source router with a very flexible software stack.
For example, you can run LXC containers on it. And it comes with 2GB of ram, more than enough for a router.
Create a Debian-Buster container:
Mind, it has to be Buster!
lxc-attach -n “peercoin”
Now simply follow the guide and install peercoind from the deb-repo:
After it’s done just run peercoind: