There are a lot of variables in a quote for drapery-- how many legs, borders, travelers--- sizes of each, configurations, etc-- will you be redesigning the masking set? Lots of questions. A good place to start though is to visit Rose Brand or IE Weiss web sites, create an account and list some materials for quote. They are very helpful as well and can discuss a lot of the job with you. Depending on your location, there might be a firm that will come out and bid the job for you as well. Rose Brand might be able to direct you to a local contractor as well.
We just did our drapery set with some redesigns and it came in at right around 20K.
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Michael Johnson
Trinity NC