I know of several design coaches in our area, rather than an interior decorator. The coaches charge a flat hourly fee, use what you already have and provide drawings and links for ideas that you procure on your own. You do the shopping and "doing" and the coach doesn't get a cut from the goods and labor like a traditional interior decorator. I recently worked with one to pick paint colors and it was a good experience. Maybe ask around locally - my neighbors recommended one to me.
Mom to Two Wild and Crazy Boys and One Sweet Baby Girl