Piracy: ꜱᴀɪʟ ᴛʜᴇ ʜɪɢʜ ꜱᴇᴀꜱ

I have an old Linksys router which I have read is quite "hackable" for setting up a VPN with custom Linux firmware (tomato, etc.). Everything I have looked up on it, however, seems to be about creating a VPN so that you can access the internet from anywhere in the world, but utilizing your home IP address.

I want to plug a wi-fi router into my internet gateway, and then have any device in the house that connects to that device be using a vpn to show location as somewhere else. (I.e. keep HOME, Home_Guest and add a new CANADA SSID to choose from in the house. My main use case is so that I can switch APs using the infrared red remote for my SmartTv and watch live streaming of our local baseball team on my brothers' MLB.TV account (free with T-Mobile Cellular service) where it blocks local IP addresses in hopes you'll pay for the silly cable package in order to get the RSN.

Am I barking up the wrong tree? Should I be looking for a different solution, or am I just searching the wrong terms? Any particular VPN provider you'd recommend for something like this?