Creating a VPN to stream ALL my TiVo Roamio channels away from home

I have TWC in NYC which ABSURDLY sets the copyright setting on all the non-OTA channels such that I can stream at home but can't stream outside the house. Comcast and other providers don't do it. On a different thread here, someone suggested that you could set up a VPN to replicate your in-home streaming iOS experience when you're out-of-home (OOH). I want to do this! I started researching if I could/how to go about this and realized...I have no clue how and know less about this topic than I thought I did.



Here's what I have:

TWC (television and premium internet)

Arris DG860A wifi modem router from TWC

TiVo Roamio Plus (connected via ethernet to the Arris)

iPad & iPhone running latest iOS and latest TiVo app



Is this something I can do with the equipment that I have? Does my router support a VPN (is that even a relevant question? I logged in to the configuration interface for my modem and I didn't see an obvious "VPN" tab where I could configure this but maybe I missed it)? There are so many high-lever users and experts on here, I am hopeful someone will please tell me how to do this or refer me to instructional articles that would teach me how. (Because the resources I was finding online were all either irrelevant or made sense/got me no closer to my goal.)



I think this is a much more appealing offer than getting a Sling (I've burned through too many of those flawed devices over the years) if this is something I can make work for me.