The pricing would depend on the project of course if it has complex details and the timing. Also as a designer or decorator you may also want to use a 3D rendering. A flat drawing is good for many purposed but when you use three dimensions, potential clients and customers can really imagine how all the elements of a room will fit. Business owners may also want to see a designer or decorator use a 3D rendering for offices, cubicle spaces, and so on. They may want their office to be more than just functional and using three dimensions can give them a feeling for how customers or clients may see that office when they visit. And it's often easier for a customer or client to make changes to their design with a 3D rendering. They can imagine furniture, artwork, and other accessories as they'll be placed around a room. I know a small rendering firm who can help you with that. 123Dview can create photorealistic renderings at competitive prices. Superior quality plus affordability is what 123Dview is all about. You can check their website at http://www.123dview.com.