I have two HMC150s and have not produced anything in 3d yet, but am concerned that they might not work because the lenses would have to be at least six inches apart. My theory is that the farther away the cameras are from each other, the farther away I would have to be from my talent.

Also, I have an SD projector and a white screen. I'm thinking it should work, but wanted to check. It sounds like it would need to be anaglyph, and it sounds like that's the lowest quality. I'd like to use 3d for presentations, where everyone has cheap glasses.

My theory is that the farther away the cameras are from each other, the farther away I would have to be from my talent.

Yes, as per the 1/30 rule, which states that in hyperstereo the cameras should be separated 1/30 of the distance of the closest object your cameras see.