less. It,s all in the cost of labor, materials, overhead and shipping. You are always encouraged to contact the individuals who are inspired by your photos. Houzz.com photo are also part of an education process for users. A set of construction drawings and specification for a project like this might be
Example I do furniture designs for one firm that in one case is selling 1 a week. I didn't charge them for the design, but I do get a % of gross after they have sold 50 units. Most will not make this level, but there is a satisfaction of seeing that the design is appreciated.