Another small problem I see in your cad drawing is you single chainstay is on the wrong side for a derailler. I don't even think you can use an internal gear hub that way. This sure looks like you really didn't even look at any bikes much less ride any when designing this. And, the materials would make this bike so expensive, most college students wouldn't take a chance riding it around campus in fear of having it stolen.

If this was an exercise to design what students would love to have as a commuter? This was a great try. But I think you'll need to do more research with a larger selection of riders(which you are posting here) and on bike design and function if this was a true attempt at the next best folding bike.

Good luck with your endeavors!