See this post for example setup, where a Router is used to connect to various Wifi network, then it uses NAT to and sends wifi out again on a different SSID.
This could be used to connect to VPN as well.
Any Wifi MT Router could do this. Chose your router from need of 2GHz, 5GHz, etc.
In the blog link posted above, the writer has used 2.4 GHz interface to connect to hotel, and 5GHz to its client.
You can as in my link above see example where 2.4GHz are used for both hotel and local clients with different SSID.