Best WIFI Hotspot

I use DirecTV now for tv. There is a tv on inside the RV almost all the time unless we're out sightseeing or shopping. I would like to go to one of the web-based tv services but I don't think we can stay within the constraints of use limitations. If or when there is a truly unlimited use option I will sign on and use it on the road and at home, Every unlimited data plan I read about will slow you down at some point, so that I can't use it for tv, especially when two or more TVs are on at once in the home.