@SaintMAW 

vpn like third party never really likes routers. asus, whatsoever the router you got.

for tplink router, you need to know the vpn details like ip or domain of their server, preshared key and subnet for remote connection. 

mode you need is client to site. 

for the v1 or v2, they don't have many changes with the vpn. 

JUST, these vpns don't want you to put the vpn on the routers. they prefer you download their apps. not letting you know their vpn server details. 

and some vpn may not be the regular pptp, l2tp or openvpn. (openvpn does not support un psw on current firmware.)

  @SaintMAW 

I have not tried this option YET with 7206.  The only issue I've encountered in the past with other router vendors is that the throughput is really low.  

Most of the paid VPN companies don't give you bandwidth (horsepower) on their end to sustain a decent amount of bandwidth.  I remember configuring VPN companies to my OpnSense appliance.  Which was a nice dell blade and got 10mbps up and down off the VPN pipe.  I could get more (way more) than that on an S2S VPN connection.  

If you're also worried about privacy, I would consider looking into the 14 Eye Alliance.  You may want to consider getting a VPN service from a country NOT within this alliance.  But that also comes with low bandwidth too.  

  @SaintMAW  How's that going there? I'm still looking for a best-value router VPN but I'm really not good at it. I got a VPN called PandaVPN for my trip abroad last month, but it doesn't support router. And now I plan to get a router-supported one instead to protect more devices at home.