I know this is probably an impossible question to answer. I am guessing it is done on an hourly basis. What are the steps used to figure out what a ground up add-on should cost to have made? I only ask as I am thinking about at looking around at who's can be hired. I am a bit afraid of going to low price offers as I don't know if the quality is there, if I go high priced I don't know if I am just paying extra. Not sure the best way to evaluate who to hire for custom work as well. I don't mind spending good money for good work.