How much are you paying for tailscale?

To make the server accessible via internet, it’s a VPN service.

You could do it without tailscale too, but using it makes things extremely easy.

Which hardware do you recommend? I am thinking about setting up pihole as well in the same server. Do you think this would work? I am trying to find a reasonably priced refurbished server, but I am finding difficult to find/understand how big HDD these support.