Not really as long as you use some VPN that's not braindead stupid like OpenVPN. Wireguard is the perfect protocol, there's almost no overhead since it doesn't need keepalive packets or anything and there's no handshake beyond the initial connection either.
I've read reports of 3% to 10% battery usage with Wireguard on smartphones. To me even 1% would be too much but maybe that's not the case for you. I don't mind paying 2 bucks a month for a great product that is extremely simple to set up. If you prefer the way with Wireguard + Pi-hole than that's of course fine. To each their own.
Not really as long as you use some VPN that's not braindead stupid like OpenVPN. Wireguard is the perfect protocol, there's almost no overhead since it doesn't need keepalive packets or anything and there's no handshake beyond the initial connection either.
I've read reports of 3% to 10% battery usage with Wireguard on smartphones. To me even 1% would be too much but maybe that's not the case for you. I don't mind paying 2 bucks a month for a great product that is extremely simple to set up. If you prefer the way with Wireguard + Pi-hole than that's of course fine. To each their own.