WHat Frank said x2-- that is ideal for breeding. if you just want as pets, the 3 would be good in case one has an accident, then they have a buddy. My crew free range, they are their own little flock amoung the chickens.
I have bourbon REds have been very pleased with their temperament...
Running turkeys and chickens together is a risk for blackhead. I called extention and they recommended NOT tunning them together. I do know there is a risk. See if you cn find out if the diease is in your area and make a judgment from there.
If you do get turkeys, raise from a day old poult or...