Read some of the other threads on wifi.
This suggestion works well, until your carrier throttles your data feed, usually somewhere around 10Gig. That is about 3-5 nights of watching movies/or TV. Even with "unlimited" data, which really with most carriers is not "unlimited" there is a point where they cut your usage because you are limiting other users (if everyone was doing this at the same time).
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And, of course someone will jump in here and tell us they have the best plan in the world and unlimited data till the cows come home. If that is true, go for it, but read the fine print and check with the carrier before you jump.