I shot the North America Nebule with my astromodified Canon 60D, an EFS 18-135 lens, and the Move Shoot Move star tracker. This might be the cheapest and easiest astrophotography setup you can use.
Would have been instructive to hear a bit more about the limitations of this setup. Why wouldn't you show a larger image, not even one at the resolution of the video let alone the camera? Was it the tracking, the lens, sensor noise...? What were the main bottlenecks and how could they be improved on without going to great expense?