Just received my first quote for curtains with black out linings. US$6,400.00.
That is more than I paid for my complete reference series Klipsch system with the RSW 15 subwoofer.
Any cost effective solutions around half this cost?
Sounds like you have a "designer" involved! Fabric costs are highway robbery as I have learned the hard way. Funny how the wives seem to think this is no big deal but raise hell when you want to upgrade your gear especially bigger speakers.
The wood shades are a good idea but may be rather sound reflective.
www.countrycurtains.com may be a cost effect fabric solution worth checking out. I bet you can do it for less than $1500- not as cheap as the wood blinds but may look and sound better. You have to hang it yourself but this is easier than putting your theater together. Good luck.