I think not, because making the product is much harder than that. Lots of difficult 3D work, reverse engineer very complex file formats, specialized domain know

I think not, because making the product is much harder than that. Lots of difficult 3D work, reverse engineer very complex file formats, specialized domain knowledge for some features. There are work for a whole team easily, it's really not a two people startup. Selling the product to some smaller companies is probably easier. I have some family working in industrial drawing, I think it's doable if you sell hard enough, as long as the software is as good and can import and export seamlessly. I think it's quite doable overall but it's a 10 year endeavor. Need to start with $10M and a couple developers and play the long game before you can replace autocad at Boeing/Airbus.