He also seems to have misread Susan. In the story she describes the project as "fun" before he asks what she'd pay. At that point he probably should have picke

He also seems to have misread Susan. In the story she describes the project as "fun" before he asks what she'd pay. At that point he probably should have picked up that she was being kind and was not in fact seeing a product she was interested in buying. He probably could have figured that out by asking doctors before he built the thing.