Lets see, nearest competitor is the BD sensor, runs around $30 plus many weeks delay to get shipped here. And a toolboard, either the Ebb36 or fly run around $45+. Then I would get to integrate it into the controller board/Raspberry Pi ecosystem ( Pi boards are dropping in price but still expensive ) that is needed along with the work needed to control all the parts. Make sure you RTFM before you ask any questions if you get stuck. And praise Klipper to high heaven on any post.