Sorry late to the party...
It should be feasible. I have been looking at these serial ttl cameras for a project to trigger ~50ish cameras simultaneously and download the images one by one. The camera protocol looks like this is possible. The snapshot command stores the image in the camera's buffer. You and then round robin through them and capture the data off, probably a few seconds each, depending on the board's max bps over the serial line.
Check out the adafruit serial ttl jpeg camera for code examples of controlling the camera and documentation.
I'm probably not going to go with them because of artifacts in the captured images that won't work for my project. Still hunting for a reasonably priced solution...