This particular stair ran around $30k including design, engineering, steel, wood, glass, stainless, installation, and finishing of all wood components. We are always working on ways to standardize modern stair options to make these custom designs more affordable. Each project comes with its own set of challenges, code requirements, and aesthetic preferences so it is difficult to offer "boiler plate" pricing. For example, this client required welded and seamless joinery on all stainless steel components. The use of fittings and unions is one way to save money in a way that has little aesthetic impact. Let me know if there is any way we can be of assistance! Thank you!