DON'T DO IT
I did the same thing, those camera are always on auto mode, meaning you will get 25 pictures with different ISO, and aperture speed.
Photogrammetry reconstruction needs pictures with the same ISO, aperture speed, and aperture opening to generate good result.
I have a 25 Coolpix array and almost all the times 5-10 of them can't focus properly.
With only 10 second hand canon 600D (DSLR) you'll get much better result.
From my experiment I saw that if all the camera focused properly then only 10 camera were required to get a face scan.