I set out to make something that filled a specific need of mine but in a way that it would be easy to package up as a tool for other people meaning it was clean and well documented. Time spent is a little difficult as the majority of the work was research for a separate project that gave me the idea for this one. It was in the realm of weeks to build the end product and days to make their requested adjustments though. I believe the sale price was around $500 - $800