I want to wallpaper my room is it too expensive?

I have no clue how much it would cost, my theme is french vintagey… i have all my furniture , a white iron bed, a 1930s carved wood (painted a dusty rose) dresser…. vintage dressing table, etc.
the rug is an ivory flokati. There are 6 windows. does this sound like a good plan, i was thinking of doing cream and pink for the colors and buying some wallpaper.
the room has a bay window its 17 x 10 feet except there are 6 windows total (3 stained glass small ones) and thick crown/base molding, so total area of the room is less.

Your white iron bed will look good on a mid-tone color wall. What size is your flokati??? Wallpaper can range from $100 to $1000, but you can get good deals on discontinued patterns. Is your trim natural or painted??? Ceiling finish???

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