I am needing to make a electric turner that will turn about 50rpm's that will hold a metal tumbler (coffee cup). I cannot find the right motor. Others are using a chicken rotisserie but I want at least 6 and at $30 each is too pricy for me. Can you pls guide me in the right direction for a electric motor that does around 50 rpm's. I will also need each motor to turn off and on individually.