Discount window treatments don't usually involve custom work, but you never know! One thing that you can do, especially if you have many windows that need window treatments; speak to the owner a drapery place. Ask if there is a discount available if you end up using their services to do your entire house. Discount window treatments in this way can be found in many expensive operations.
You can also find discount window treatments in places that will offer standard window dressings. Don't despair if you have non-standard windows that still need curtains, though! There are other services which can cut those blinds or shutters down to size, and you'll find that the money you save by buying inexpensive window treatments and having them cut down (or doing it yourself!) is quite formidable.
In general, when searching out discount window treatments, you will want to keep an eye out for sales. Even doing this can be an exercise in creativity; look around and take a look at window treatments you may not have considered. Use your imagination and you might end up with a more attractive, interesting room than if you had paid full price!
Another place you can think about trying to get discount window treatments is garage sales. Garage sales, estate sales and similar places can be a gold mine if you seek to restore an old house. Often, people are trying to sell beautiful curtains and shutters for a fraction of what they're worth, and you can see if they'll fit your windows. If they are just curtains, any competent seamstress can cut them down to size for you and in this way, you can get an even better fit for your curtains. Bargain trolling in this manner is ideal if you are only looking to redecorate one room.
Discount window treatments are not impossible to find, and with a little bit work, you can get a discount window treatment that meets your needs and then exceeds them!