There's a reason this giant television is called The Wall.
Because it basically IS a wall at 18 feet, or 219 inches.. and it ain't cheap.
AND GUESS WHAT. There is an even BIGGER one at 229 inches.
The old 'if you have to ask' about how much it costs, you probably can't afford it.
However, there is a more modest 75 inch model called The Window, which is actually customizable. INFO HERE