What other router do I need to work with Vodafone 500mb

I'm having Vodafone 500mb fibre broadband installing tomorrow but I want to use my own router because I want a VPN on my router. I don't trust anyone nowadays. The router there suppling is a 5g Power hub. I want to buy a pre programmed VPN router with a VPN service. Does anyone know of a company who can do this for me. I don't want to pay anymore than £80 for the router. I will pay a monthly subscription for the vpn