Ok so many different suggestions here, thanks everyone! Follow-up questions 
Would the benefit of setting up a Google TV just be for money vs the Nvidia Shield?
Manuallly updating apps need to be done at what frequency? How much time would it take per week?
Your solution seems like the “best” solution, but also seems like a pain to setup and manage. Would there be any other benefits aside from the money saving?
Does LineageOS have a good UX comparable to GoogleTV? What are your experience with it? Any bugs or just annoying things that happen? Also, does all the “mainstream” app work with this setup? Like Netflix, Disney+, Crunchyroll, etc. It’s ok if not, I’m just wondering.