I admire people who are able to really believe in an idea they come up with and spent many years building it. I'm sure OP when you started off, you saw competitor offering, what made the turning point that made you realize and committed, "you know out of a million other ideas, this is what I want to work with".

I have a million ideas on my diary and have yet to build any of them. They aren't truly unique but I see them as a "practice" that when one Mythical day I don't have worried and have ample time, I can take the first step. My current free time is occupied by job hunt and LC..

Also, in term of technologies, what is the core idea/tool that converts 2d drawing into 3d. Is it truly automatic or some core principles behind it, like OCR but for 3d models? I have zero exposure in OpenCV