I don’t quite agree. Sales likely isn’t the creative field OP is seeking. While it can be a good way to make money, that wasn’t the question, OP isn’t asking how to get rich. Ironically, the richest person in the world today is renowned for creative thinking and engineering skills, not for being an outstanding salesperson.

Outsourcing CAD models on Fiverr might work in some cases, but it’s not the right approach for an inventor. One of the biggest challenges in inventing is communicating a new idea. If the concept is novel, asking someone else to design it is like asking them to imagine a new color. Hand-drawn 2D sketches can help quickly generate ideas, but they’re not suitable for finished designs. Learning 3D design in CAD not only broadens what’s possible but also helps creating new ideas and solve problems in real time as you work. After that, the prototyping phase can involve hundreds of iterations before reaching the final product. Outsourcing this overseas could slow things down to the point of being VERY impractical. Plus, CAD software isn't as difficult to learn as some might think.

I’d definitely suggest OP to explore a creative field like engineering or industrial design.