Mobile router hotspot help

I've recently started working as a security guard, the days consist of 12 hour shifts with a whole lot of nothing to do besides sitting down and being extremely bored. I've been looking into mobile routers so i can stream YouTube, netflix or hulu. I've came across the nighthawk m1 and at first it seemed perfect. After some digging it seems there is alot of mixed feelings and i don't see any answers for what I'm looking for. What i want is a true unlimited data plan for streaming videos/shows with no throttling or slow downs for a great price (55 or lower), i don't know if what i ask for is impossible or not. I don't want this for home wifi in a rural area, i don't want this as a secondary source or to connect it to my home router, i want something to watch videos on for 12 hours a day 5 days a week while i sit on the the side of a street by myself. I never looked into mobile routers or hotspots or anything before so i just need some help and advice because i don't understand alot of the terminology. Thank you if you read the post and thank you even more if you have answers and help me find out