Access point VPN questions

[spoony77]

Hi people
I'm looking at buying a second hand router and installing dd-wrt on it and running it as an access point in my home network alongside my Virgin media superhub.

I was wondering if it's possible to run a VPN service on this router/access point and if I was to do so could I have a Nas running directly off it and if so would I be able to access the Nas from outside the lan or would I need to have the Nas connected to my superhub for remote access?
Is it as simple as the VPN access point will have a separate IP address and I use this IP for remote access?
*Confused*
Cheers

 

[spoony77]

Brill that makes sense, thank you.
Are there any sub £100 routers that will run a vpn without crippling it's speeds too much?
I was thinking of using ipvanish or nordvpn...