Done many!!!You are going to have to construct it with strength in mind, perplanned walk paths to set up mounts,,,and pre-planned mount locations... Next, figure in for a large amount of supplies, habitat and rock mix, paints,, sealer- usually a combo of matte and gloss...Custom installations also require extra measures to protect the clients house/belongings etc, so you must also include expenses occuring there, ie. paint drop cloths etc.. Include the costs of getting the materials to the site as well- fuel, taxes etc.. Also include the time involved in diagraming and sketching or model work...There is as much behind the scene time involved as there is in the actual project!! Do it well, and GET PAID FOR IT!!
