Route public IPs over VPN (IPsec?) to another router to be sent to the Internet

[SBTech]

I have a core router with a public /24 public ip range. I have chopped that into smaller subnets for router downline. I'm adding another router at another location that I want to route all the traffic thru a VPN to the core router so the devices behind the new router pass all traffic to the core router and then to the internet. I understand that this will double the traffic at the core router and that is ok.

Is this posible with pfsense? can I use IPsec or do I need to use another VPN?