Reverse proxy on the router or in a vm?

So I need to get a reverse proxy up. I am stuck between running it on the router or in a VM on a server.

Pros I see to router: no local DNS serves. No server resources, SSL offloading at the edge.

Cons to the router: servers dependent on the router. No modularity.

Pros to vm: redeployment in case of server failure. Less dependent on router.

Cons to vm: requires local DNS servers.

I would really appreciate some thoughts.

I would run it on the router but then I would not feel safe without a backup router. Ik ik. Thats standard anyway but like always im looking to save some coin. So thinking the VM would be a better solution.

Sorry if this is a noobie question