Self-Hosted Main

I've been putting off switching to a cable-modem I bought a few months back, because of Comcasts tech. support.

I've also been trying to self-host services with tailscale(VPN)-caddy(R.proxy)-Pi-hole, but have been having little success.

I don't want to directly expose the NT IP. like with DDNS. I also don't want to use CF tunnels, b/c they route through CF and could cut me off from my service if I stream too much of my media.

With the Comcast default router/gateway they don't let you set custom dhcp or dns or dynamically FWD dhcp or dns to other devices.

Is this why the Videos on-line explaining self-hosting always say do what is best for you; but I bought this PFsense or expensive Unify router for example??

Is self hosting with a default router even possible??

I have a DDWRT as my wifi router already, and a second one I can place behind a plain cable modem; which I get I will have to call customer support to get working. I plan to use the First DDWRT with wifi disabled as my DHCP server, and have DNS forwarded to a pi-hole.

Is this the best idea for getting my services working properly??