Thank you for the kind words ^^ Yup 100% of the code, from the backend scanning the prices and frontend UI graphs etc was done by me. Hours wise I have no idea, a month maybe with a few hours of dev time every day on average. I myself am somewhere in between a hobbyist and a professional, so I still had to learn new stuff to make it happen so it took longer than expected.
But now that Boundlexx API: An API to get all things related to Boundless exists I’d suggest using that as your data source instead, getting an API key and building a backend to scan the game servers, and serve that data isn’t simple 
Back then it didn’t exist so I had to make my own, and it’s starting to show some cracks 
Do read the post here though about the automatic data analisys part from the second paragraph onwards. The “deal and courier mode” stuff and what the devs said about it.