- "Open" usually implies open source, but i'm assuming yours isn't open in that sense (or you wouldn't be charging for it).
- I found nothing on Kickstarter under "opensight", and so have no idea what your idea of "affordable" is going to look like.

Simplified mesh editing (adding, deleting, filling, patching, etc) would be high on my priority list. Make it simple - more like MS Paint and less like Meshlab.