I do know all of the specifics of the project that i should be able to answer any specific questions as you're trying to help me.
so the array is going to be placed in an high grade incubator(due to really high humidity water accumulates on the parts) meant for cell cultures and things like that. So it has to be able to transmit through a metal housing but past that only about 5 feet
Also, as i said before i need it to be able to rotate really slowly while being easily controlled. These motors have to be very small (servo was the only thing i could find that was small enough but a dc motor that size would be fine.) these motors will be rotating a rod with a ball bearing at the end in order to roll along a prefabricated rail and all 24 motors will be going along their own rail,i only need to to be able to maybe turn somewhere around 720 degrees in either direction since the rails are pretty short. This is the reason why i need pretty precise control over the motors and also why i have to be able to control each one individually otherwise they would shoot off the rails.
Also, i was wondering how many motors i could hook up to an arduino, i saw one guy do 10 by using a breadboard somehow and i think minimizing the number of arduinos could help cut back on costs.
As you can see i don't really now a whole lot about servos and motors but i thought i would have to just wire some batteries in there to help run it.
That 32 servo controller also looks like it could be a great help if it turns out that i can use servos thanks.