There are small styrofoam ones that will hold 20 eggs. You can buy the incubator and turner for around $83.00. Try Tractor Supply. We have had great luck with one of those. Good luck. Let us know how you did.
I picked up my Little Giant still air incubator down at my local feed store for $55.00. It says that it will hold up to 40 chicken eggs. I started with 25, now have 21 and there is plenty of room.