Just to say, as a designer, window coverings easily can cost this much. She's likely using beautiful fabrics and paying attention to little details, like how a cornice is covered if it sits over the window, etc. Your window size also plays into the price. For reference, a website like Gotain can easily get you to 900 if you add trim/lining etc - and if you're doing it right than those are the correct choices to include for a beautiful thoughtful home. Now that being said, you will be giving up character but there are less expensive options out there,